Just bought a 99 convertible 2 days ago. When I bought it the HUD was working fine. Now it will display but it cannot be adjusted up or down. Is there a fuse controlling this function? I can see the HUD if I crouch way down and its working just wont move up to where I can see it while driving? Any help would be appreciated. Thank You

 

Did you check the brightness control? It is a slide switch to the left of the steering wheel. Slide it up all the way to see!

 

Brightness control works fine. Like I said you can see the display if youre about 4 feet tall. I just cant adjust it up or down for me to see at 6' 2". Thank you for your reply!

 

If it IS broken, and not saying it is, not that expensive to fix if you can do it yourself. Could probably get it for $100 or less to replace the projector.

 

In the manual, the troubleshooting guide for "HUD Image Adjustment Inoperative" tests all the connections and does a continuity check on the display up and down circuits at the switch using a test light. After that it checks the dimmer switch for poor connections. If no joy, it goes into switch replacements.

HTH

 

I would test the switch first (its cheaper and easier to get to). If that checks out, you have a failing projector(most likely) or a bad harness. They're cheap on ebay May the force be with you!!

 

There is a small connector from the cluster to the hud so you want to make sure its connected all the way. Also the connector from the hud controller which goes to the cluster. You'll need to remove it to get to them.

 

Thanks to all for replying...I figured I would take it back to the dealership where I bought it since it was the next day after I bought it that It wasnt working. They determined after about 20 minutes that the motor operating the up and down movement for adjustment was no good and that they were gonna do me a favor and split the cost of a whole new HUD to the tune of $800 my cost being $400 his remark was they dont even have to do that. Not even 24 hours after leaving the dealership this stopped working. Im not done with this dealership as my salesperson was off of course when I went in for service today so we shall see...Thanks again

 

If you are the only driver of the car, maybe you can adjust it so it works for you. It kinda sucks not being able to adjust it on the fly, but I didn't find myself adjusting it that often.

 

The HUD only costs $200 new from GM

 

Im guessing to do this yourself you have to remove half the dash? I havent really looked to deep into it as I thought the dealership would have fixed this for me. It is a pretty big Chevrolet dealership. I drove out of the dealership at about 3:30pm and by 5:00pm the HUD wasnt adjusting up or down. I called the salesman the next morning to make him aware and returned to have them look at it. when they couldnt fix it quickly I set up an appointment to come back which was today 5-12-08. It was pretty quick that the service writer came to me and told me the adjustment motor was fried. I dont believe anything was removed from my dash. it was in their possesion for about 30 minutes. Is that enough time to determine this motor was fried? concidering the location of this motor. Im thinking they checked the switch only(because he told me the switch was ok) and that was it? And decided the whole unit needs replacing. Thanks again to all!

 

It seems like it is time to have a talk with the owner of the dealership. By the way here is the diagnostic procedure for the up/down movement of the display:

Head Up Display (HUD) Image Height Adjustment Inoperative
HUD Image Height Adjustment Inoperative Step
Action
Value(s)
Yes
No

DEFINITION: Head-up display image does not move UP or DOWN properly.

1
Were you sent here from the HUD Diagnostic System Check?
--
Go to Step 2
Go to Head Up Display (HUD) System Check

2
Turn OFF the ignition switch.
Move the head-up display dimmer switch to the full bright position.
Turn ON the ignition switch.
Do all segments of the head-up display illuminate for 3.5 seconds?
--
Go to Step 3
Go to Head Up Display (HUD) Inoperative

3
Operate the head-up display image UP and DOWN by pressing the DISPLAY button.

Does the head-up display image move UP and DOWN properly?
--
Go to Head Up Display (HUD) System Check
Go to Step 4

4
Head-up display switch still connected.
At the head-up display switch connector, jumper terminal 9 (Gray) to ground.
Does the head-up display image move UP properly?
--
Go to Step 5
Go to Step 7

5
Head-up display switch still connected.
At the head-up display switch connector, jumper terminal 8 (Orange) to ground.
Does the head-up display image move DOWN properly?
--
Go to Step 9
Go to Step 7

6
Turn OFF the ignition switch.
Reconnect or install any connectors or components that were disconnected or removed.
Turn ON the ignition switch.
Move the head-up display dimmer switch to the full bright position.
Operate the head-up display image UP and DOWN by pressing the DISPLAY button.
Does the head-up display image move UP and DOWN properly?
--
Go to Head Up Display (HUD) System Check
Go to Step 12

7
Check the head-up display switch harness and connector for an open or short between the head-up display switch and the IPC.

Was a problem found and repaired?
--
Go to Step 13
Go to Step 8

8
Check the head-up display unit harness pigtail and connector for an open or short between the head-up display unit and the IPC.

Was a problem found and repaired?
--
Go to Step 13
Go to Step 11

9
Check the head-up display switch harness and connector for an open or short between the head-up display switch and the IPC.

Was a problem found and repaired?
--
Go to Step 13
Go to Step 10

10
Replace the head-up display switch. Refer to Head Up Display Switch Replacement .

Is the replacement complete?
--
Go to Step 13
--

11
Replace the head-up display unit. Refer to Head Up Display Replacement .

Is the replacement complete?
--
Go to Step 6
--

12
Replace the IPC assembly. Refer to Instrument Panel Cluster (IPC) Replacement .

Is the replacement complete?
--
Go to Step 13
--

13
Turn OFF the ignition switch.
Reconnect or install any connectors or components that were disconnected or removed.
Turn ON the ignition switch.
Is the repair complete?
--
Go to Head Up Display (HUD) System Check
--


Bill

 

Does anyone think they could have determined the motor is fried in that short time? (30 Min.) And wouldnt they had to open the dash to do so? or can u get at it from the top? Just curious because I think Im being had. This is a great way to keep a customer...sell them a car and the next day tell them they need a $800 part but theyll be nice and absorb half and I quote "we really dont have to do that"

 

I think they're trying it on

Take a look at the diagnostic procedure. Theres no way they ran through that in 20 mins. I'm not even sure thay can diagnose a motor problem that quickly. It could be a connection or a switch. They decided the quick solution was replace the whole HUD unit.

Now if that was me I'd be saying the failure was evident when I collected the car. If the motor had failed after that time would you pay for half? I wouldn't. In other words 20 mins use is not "marketable quality". I'd be looking for them to pick up 100% of the costs.

 

I had to replace mine due to a failing HUD light sensor. It took all of about 2.5 hours for me to get the dash pad out, remove and replace the HUD and then replace the dash pad.

 

It has been a long time since I have actually bought a used car at a dealer but it seems like they always had stickers indicating they would provide a 30 day warranty. This not true anymore?

 

Seems unlikely that they removed the dash and checked the connections and replace everything in 30 minutes.

 

Aren't we forgetting something? If the dealer wants to shotgun the repair and put a new unit in that's up to him. If the tech missed, it's still the dealerships bill. the only bad deal is your time on a second visit. Every used veh. my dealership sell gets a 90 day warranty. my job gets easy at that point, just make the customer happy!

 

You don't have to take the dash pad out to get to the connectors, rather the IP Cluster only. I don't want to say it for the record, but it might be possible to get the HUD out from there as well. I did mine by removing the dash pad but there might be enough room with the cluster out of the way.

 

This is so common at dealerships (not all dealerships and not all of their employees), they frequently use a cannon to kill a mosquito, they don't make money off P&L when something is a quick, easy fix (though they'd have loyal customers). I think it's partly about sheer ignorance, and partly about making money and indifference at how much it's going to hurt your pocket book.

If they sold you on an entirely new HUD when that wasn't what you needed, they should either reinstall the original HUD which wasn't faulty and refund what they charged you for the new HUD and all the labor (except diagnostics), or let you keep the new one at no charge. You shouldn't be made to pay for their misdiagnosis of the problem, which happens entirely too often. And don't even think about falling for the "well you actually needed a new HUD too" line.