2000 ECM with a 1998 C5 engine
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
2000 ECM with a 1998 C5 engine
Never ran across this before--This is a 1970 Chevelle with a 5,7 engine out of a 98 C5--the ECM says it is a 2000 ECM-- It has a 4L60 trans --DBY throttle------The engine runs fine--However it is in LIMP MODE and starts out in 3rd gear and will not upshift or downshift
The confusing issue is that in the tune file the ECM "platform" says that it is both a Y-BODY and a GMT530 ??? I have never seen a tune file before where it lists 2 different platforms on the same tune---
Anyone ever run into this before and know a fix ? to get the trans to communicate with the ECM ? Could it be a faulty wiring harness ? which is a cheepo aftermarket one
PS I really don't even know what a GMT530 was used in---I am guessing it was a Mid Sized TRK or a SUV But I have never seen this combination on any 2000 vehicle----
THKS
The confusing issue is that in the tune file the ECM "platform" says that it is both a Y-BODY and a GMT530 ??? I have never seen a tune file before where it lists 2 different platforms on the same tune---
Anyone ever run into this before and know a fix ? to get the trans to communicate with the ECM ? Could it be a faulty wiring harness ? which is a cheepo aftermarket one
PS I really don't even know what a GMT530 was used in---I am guessing it was a Mid Sized TRK or a SUV But I have never seen this combination on any 2000 vehicle----
THKS
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
Never ran across this before--This is a 1970 Chevelle with a 5,7 engine out of a 98 C5--the ECM says it is a 2000 ECM-- It has a 4L60 trans --DBY throttle------The engine runs fine--However it is in LIMP MODE and starts out in 3rd gear and will not upshift or downshift
The confusing issue is that in the tune file the ECM "platform" says that it is both a Y-BODY and a GMT530 ??? I have never seen a tune file before where it lists 2 different platforms on the same tune---
Anyone ever run into this before and know a fix ? to get the trans to communicate with the ECM ? Could it be a faulty wiring harness ? which is a cheepo aftermarket one
PS I really don't even know what a GMT530 was used in---I am guessing it was a Mid Sized TRK or a SUV But I have never seen this combination on any 2000 vehicle----
THKS
The confusing issue is that in the tune file the ECM "platform" says that it is both a Y-BODY and a GMT530 ??? I have never seen a tune file before where it lists 2 different platforms on the same tune---
Anyone ever run into this before and know a fix ? to get the trans to communicate with the ECM ? Could it be a faulty wiring harness ? which is a cheepo aftermarket one
PS I really don't even know what a GMT530 was used in---I am guessing it was a Mid Sized TRK or a SUV But I have never seen this combination on any 2000 vehicle----
THKS
My buddies 2000= GMT350
A 98 = NA as it does not even show that field under "system"
Safety Car
Joined: Aug 2011
Posts: 4,437
Likes: 404
From: Portland OR
Hey Tom.
Odd issue.
You could try to change the system platform stuff and see what happens,
Lots of folks have changed C5 97/98 ecu to the later stuff with just gas gauge issues. But not trans issues.
Engine doesn’t care, the sensors are the same as you know.
Ive no doubt you will figure it out.
Ron
Odd issue.
You could try to change the system platform stuff and see what happens,
Lots of folks have changed C5 97/98 ecu to the later stuff with just gas gauge issues. But not trans issues.
Engine doesn’t care, the sensors are the same as you know.
Ive no doubt you will figure it out.
Ron
