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Prev Professional Automotive Repair Technical Discussions for March 5, 2012
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal LS 3.8L Climate Control Head VIN: 2G4WB52K7Y
Climate Control Head illumination is very dim. Is there a place that repairs these? Saw in some archives that a DIY is possible but couldn't find the link with pictures. Any help is appreciated.
1996 Chevrolet Cavalier 2.2L Stall VIN: 1G1JC1242T
Vehicle was brought to us for a stalling issue at idle when hot. Another shop replaced computer. We got this car to stall a couple times by letting it idle for a long period of time. When it stalls it wont restart for a 2 or 3 minutes. It had spark and rpm sig...
2001 Chevrolet Silverado 2500 HD 6.6L Hesitation, Surge, MIL Lamp on VIN: 1GCHK23151
Hello to all, and thanks in advance. As my repair history states, engine was replaced with lower mileage unit and problem was there before and after. It fails to start without either. And under hard accel it sets code P0094 for fuel leak and Ive seen the desir... Trouble codes: P0094 (Fuel system small leak detected)
2003 Chevrolet Express 1500 5.3L Fuel Tank VIN: 1GBFG15T23
This customer with a chevy 1500 van says when he tries to fill up his fuel tank it clicks off constantly at any speed, claims it takes him 5 minutes or more to get 5 gallons in his tank, checked gm bulletins and there is a bulletin for installing a baffle in t...
2003 Chevrolet S10 2.2L fuel gauge-pump VIN: 1GCCS19H93
Customer complaint is fuel gauge will read about 1/4, but will not start unless a couple gallons gas minimum is added. Then runs fine. So they have to keep it above 1/4 tank. I checked the fuel pressure before empting tank and was a few p.s.i. low. Came in wit...
2005 Chevrolet Silverado 2500 HD 6.0L reverse VIN: 1GCHK23U85
hello fellow techs.sorry about the long post but i wanted to get all the info in. i have a brain teaser. the elusive no reverse. i rebuilt this 4l80e 2 weeks ago. reverse band failed. replaced the band and converter along with the overhaul. all was well. got a...
2008 GMC Canyon SLT 3.7L 4wd VIN: 1GTDT19E88
We have this Canyon that has an intermittant problem with the light on the 4wd button blinking when trying to engage 4wd. We have gone through a couple different trouble trees with no solid conclusion. We have replaced the switch assembly and the module with n...
2008 GMC Sierra 2500 HD SLE 6.0L wind shield washers VIN: 1GHK29K838
This is a flood damage repair. I am down to no power to wind shield washer pump. The scan tool will send a command as well as the switch. The problem is I need to find the relay as per all data wiring diagram identifix etc.. The relay says it is in the under h...
2008 GMC Envoy SLT 4.2L Light comes on VIN: 1GKDS13S08
After I cleared the codes and drove vehicle, codes did not reappear. Customer took vehicle, had come in late in the day and needed to go home, and said they would see if light came back on. Customer later said it came on on the way home but not able to recall ...
2006 Pontiac G6 2.4L High idle speed VIN: 1G2ZF55B46
Hello and thanks replaces plugs and coil boots as routine maint, cleaned throttle plate and started engine ; idle will raise to 2500 rpms and stay there until put in gear then idle will drop to correct speed, no codes can control idle with snap on scanner func...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick Park Avenue 3.8L Cooling Systems VIN: 1G4CW52K5S
Well sorry guys, this vehicle has yet to come back to the shop. If and when it does, I will repost a new Tech-Help listing. I will be checking the "plate" on the back of the block using a borescope or something similier. I am also going to see if i can somehow...
1996 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1948T
most of you were right-timing chain/guide system.guide was worn out and broken.chain had jumped two teeth.hard to understand how you can still have 190 psi compression this far off in valve timing.but just goes to show you your first hunch is usually right.tha... Trouble codes: P0172 (System rich), P0122 (Tps).
2004 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 2GCEC19VX4
Well this is what happened. I replaced the converter with a walker ultra cat. When I did this p0430 came back and now p0420 was there as well. The p0430 code traced to a bad O2 sensor. It quit working. Must have happened in the cat change over??? The p0420 cod... Trouble codes: P0430 (catalyst system low efficiency bank 2).
2005 Chevrolet Uplander LS 3.5L MIL Lamp on VIN: 1GNDX33165
I agree with everybody the converter needs replaced, I am waiting for the customer to take it to the exhaust shop. I will retest it when it returns, Thanks to all for the input. Trouble codes: P0420.
2005 Chevrolet Silverado 1500 5.3L MIL Lamp on VIN: 1GCEK19B55
2007 Chevrolet Silverado 1500 Classic WT 5.3L MIL Lamp on VIN: 1GCEK19B17
I received some great tips, unfortunately the vehicle has yet to return. Thanks all. Trouble codes: P0327 (p0332-), P0332.
2007 Chevrolet Malibu LS 3.5L power assist VIN: 1G1ZS58N47
I did check on a recall & there wasn't one for this car. The customer has decided not to do any more at this time but I feel the column would repair it. I will also look into the sensor made by dorman. Thanks everyone.
2001 Saturn SL1 1.9L Harsh shifts at times, 2-3 flare at times. VIN: 1G8ZH52811
Most of you hit the nail on the head, the valve body was the culprit. Replaced it with a rebuilt have driven it for 4 days with no problems. Thanks guys.
2002 Saturn SC2 1.9L abs VIN: 1G8ZY12762
THANK YOU to all that replied! I doubled check the reluctor ring on the new axle and counted the teeth on the old axle, to compare and they had the same number of teeth.I rechecked the opposite axle that i was sure was OK from my previous inspection and found ...
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