Alternator compatability questions(s)??
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Alternator compatability questions(s)??
hi all,
is the newer (01-04) type alternator compatable with the older system?
car is a 2000 auto.
does or will it generate codes or cause issues with the 'puter or other electrical systems in the older model c5's?
thanks
is the newer (01-04) type alternator compatable with the older system?
car is a 2000 auto.
does or will it generate codes or cause issues with the 'puter or other electrical systems in the older model c5's?
thanks
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Originally Posted by kromberg
99.936532% sure the 01+ ones are not compitable with 00 and older.
Keith
Keith
thanks Keith.
anybody else???
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
Originally Posted by Monks
When I asked Gene at Fred Beans Chevy for a alternator
for my 99 FRC, he gave me a part number for the new
upgraded alternator. So I assume they both will work.
Russ
for my 99 FRC, he gave me a part number for the new
upgraded alternator. So I assume they both will work.
Russ
awesome! thanks!!!
Intermediate
Joined: Apr 2003
Posts: 47
Likes: 0
From: Redmond WA
I have a 99 and the dealer replaced mine with the newer one to try and fix my squeeky belt issue and I keep gettting System Charge faults every time I drive. Not sure if they got the install wrong or its a compatibility issue but I'll be taking in this week for them find out.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,840
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
I posted this many many times... the 140 amp new alternator will cause code problems with early 110 amp alternator applications because the PCM thinks the alternator is wrong. You can not use a later PCM.
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The generator has an input to the PCM called the F Terminal to indicate the percentage of total capacity that the generator is producing. This signal is detected by the PCM as a duty cycle from the generator and displayed on the scan tool as a percentage. The PCM can monitor the generators output under all conditions to determine if it is functioning normally.
When there is low demand from the electrical system on the generator, a low duty cycle percentage will be displayed. As more accessory load is placed on the generator, the duty cycle output detected by the PCM will approach 100 percent. A normally functioning generating system will never reach 100 percent as indicated on the scan tool.
The L and F terminals are the red and grey
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The generator has an input to the PCM called the F Terminal to indicate the percentage of total capacity that the generator is producing. This signal is detected by the PCM as a duty cycle from the generator and displayed on the scan tool as a percentage. The PCM can monitor the generators output under all conditions to determine if it is functioning normally.
When there is low demand from the electrical system on the generator, a low duty cycle percentage will be displayed. As more accessory load is placed on the generator, the duty cycle output detected by the PCM will approach 100 percent. A normally functioning generating system will never reach 100 percent as indicated on the scan tool.
The L and F terminals are the red and grey
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Drifting
Joined: May 2004
Posts: 1,917
Likes: 18
From: Tulsa OK
I followed EvilTwin's advise and found a newly rebuilt alternator for early models. If you need one, I can get you one for about $150 shipped. It takes about a week to get it though. I have one on my 98 and it works perfectly! Let me know...
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,066
Likes: 2
From: fort worth texas
great info and post E-T
thank you!
the reason i started this wasnt because of an alternator failure or current electrical issues.
im having a belt sliding issue. slipping or shifting over on the grooves, seperating and causing damage from the debris...
as a suggested fix we are trying a newer style alt to see if the belt slips. the newer ones have some sort of clutch on the pulley assy.
its been on for approx. 85mi now and no slippage. gonna try a 100mi cruise tonight at hwy speed and see if there is an issue...
havent pulled any codes yet...at least not elect. ones...(fingers crossed)..
thank you!
the reason i started this wasnt because of an alternator failure or current electrical issues.
im having a belt sliding issue. slipping or shifting over on the grooves, seperating and causing damage from the debris...
as a suggested fix we are trying a newer style alt to see if the belt slips. the newer ones have some sort of clutch on the pulley assy.
its been on for approx. 85mi now and no slippage. gonna try a 100mi cruise tonight at hwy speed and see if there is an issue...
havent pulled any codes yet...at least not elect. ones...(fingers crossed)..
Drifting
Joined: Dec 1999
Posts: 1,315
Likes: 27
From: Central Florida
Originally Posted by Evil-Twin
I posted this many many times... the 140 amp new alternator will cause code problems with early 110 amp alternator applications because the PCM thinks the alternator is wrong. You can not use a later PCM.
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The L and F terminals are the red and grey
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The L and F terminals are the red and grey
I have the old alternator and I took it in to get rebuilt
and they told me they wont rebuild the Valeo units. I
guess I need to keep checking.
Thanks,
Russ
Pro
Joined: Dec 2000
Posts: 747
Likes: 0
From: Columbia SC
I can rebuild any of the old alternators and do so all of the time. You can also use the "new" GM clutch style alternator in an older C5 that had the non-clutch style alternator. You will get the "Charging System Fault" until you take the car to the dealer and have the PCM reflashed with the newest GM updates for your model year. I've also performed 6-7 of these conversions successfully. Your dealer WILL NOT know anything about the "Charging System Fault" and the flash fix. But you must reassure the dealer to just go ahead and download the latest GM updates.
If you need any help with your alternator issues please email me at:
DTSNGIT@bellsouth.net
Mike
If you need any help with your alternator issues please email me at:
DTSNGIT@bellsouth.net
Mike
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 243
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by DTSNGIT
I can rebuild any of the old alternators and do so all of the time. You can also use the "new" GM clutch style alternator in an older C5 that had the non-clutch style alternator. You will get the "Charging System Fault" until you take the car to the dealer and have the PCM reflashed with the newest GM updates for your model year. I've also performed 6-7 of these conversions successfully. Your dealer WILL NOT know anything about the "Charging System Fault" and the flash fix. But you must reassure the dealer to just go ahead and download the latest GM updates.
If you need any help with your alternator issues please email me at:
DTSNGIT@bellsouth.net
Mike
If you need any help with your alternator issues please email me at:
DTSNGIT@bellsouth.net
Mike
Burning Brakes
Joined: Jul 2001
Posts: 786
Likes: 21
From: I need more money TX
Cruise-In IV Veteran
Originally Posted by Evil-Twin
I posted this many many times... the 140 amp new alternator will cause code problems with early 110 amp alternator applications because the PCM thinks the alternator is wrong. You can not use a later PCM.
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The generator has an input to the PCM called the F Terminal to indicate the percentage of total capacity that the generator is producing. This signal is detected by the PCM as a duty cycle from the generator and displayed on the scan tool as a percentage. The PCM can monitor the generators output under all conditions to determine if it is functioning normally.
When there is low demand from the electrical system on the generator, a low duty cycle percentage will be displayed. As more accessory load is placed on the generator, the duty cycle output detected by the PCM will approach 100 percent. A normally functioning generating system will never reach 100 percent as indicated on the scan tool.
The L and F terminals are the red and grey
GM has no fix for this issue and has been blowing smoke up everyones butt... the correct alternator is made in france by valeo and is 110 amp.
the new replacement is a Valeo made in Mexico and is 140 amp. I've given this advice many times, either get your original alternator rebuilt, or find a used one from an early car. Ive recieved many thank you from member who have gone through this nightmare with GM, and their dealer.
the correct part number is GM# 10246634
The PCM monitors the alternator through the red and grey wires
The L-terminal circuit from the generator is a discrete circuit (a discrete circuit has no splices and only one source and destination) into the PCM. The PCM applies ignition voltage to the generator L-terminal circuit. A small amount of current flows from this circuit through the generator windings to ground to create a magnetic field which starts the generator process. When the generator is at operating speed and producing voltage, a solid state switch for the L-terminal circuit in the generator opens and the PCM detects that the initial startup current flow has stopped.
The PCM expects to detect low voltage on the L-terminal circuit prior to the generator rotating at operating speed and conversely expects the circuit to be at ignition voltage potential when the generator is operational. When the PCM detects a fault (circuit shorted to ground, or circuit shorted to voltage), the Driver Information Center will display Charging System Fault.
The generator has an input to the PCM called the F Terminal to indicate the percentage of total capacity that the generator is producing. This signal is detected by the PCM as a duty cycle from the generator and displayed on the scan tool as a percentage. The PCM can monitor the generators output under all conditions to determine if it is functioning normally.
When there is low demand from the electrical system on the generator, a low duty cycle percentage will be displayed. As more accessory load is placed on the generator, the duty cycle output detected by the PCM will approach 100 percent. A normally functioning generating system will never reach 100 percent as indicated on the scan tool.
The L and F terminals are the red and grey
Last edited by rcws6; Apr 16, 2005 at 05:12 AM.
