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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 27, 2012
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Open Help Requests for GM
Help Request Answers
1990 Buick Regal Limited 3.1L No Start, Stall VIN: 2G4WD14T4L
We have a 90 buick regal with a 3.1L that was brought in for a no start/stalling condition. After some testing, we see that it has good spark, crank signal and fuel pressure. When cranking, the engine seems like it's trying to start but something is lacking. W...
2007 Cadillac Escalade 6.2L MIL Lamp on, service stabilitrak VIN: 1GYFK638X7
This vehicle came in for a service stabilitrak message in the display center. further testing found code p0011 cmp performance. when this codes sets it disables the stabilitrak. Using tech 2 scanner I was able to see that the desired cmp angle and actual cmp a... Trouble codes: P0011
2000 Chevrolet Cavalier 2.2L Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G1JC124XY
Car misfires on cylinders 2 and 3 just off idle up to around 1200 rpm.Will only do it in drive,not reverse,park or neutral.The PCM controls both ignition coils.When I scope the control wire for #2 and #3 coil the signal has a major glitch in it.The scope patte... Trouble codes: P0300
2004 Chevrolet Silverado 1500 5.3L A/C Compressor VIN: 2GCEK19T54
This is my vehicle. I know the compressor is suppose to engage when you put the defroster on, but it's not suppose to engage when I have the vent on and push on the recirculation button unless I also put on the A/C button. I replaced the HVAC control moduale w...
2006 Chevrolet Silverado 2500 HD LT 6.6L fuel prime VIN: 1GCHK23D86
this truck came in on a tow truck I check the fuel filter housing bleeder to se if there was fuel there there was not any I pumped the primer pump a few times and got plenty of fuel. I then reinstalled the bleeder and the truck started right up. Why would this...
1990 Geo Metro LSi 1.0L Excessive Emissions, Poor Fuel Economy VIN: 2C1MR2466L
I have this metro at my shop and it is running constantly around 10% CO and after having looked at it. It seems that the throttle body hoses stay cold which in turn doesn't let the coolant temp sensor get up to temperature. So while the gauge in the dash says ...
1996 GMC Sonoma SLE 2.2L battery and alternator VIN: 1GTCS1943T
Costumer complaint battery drains down in three or four days and the batt light came on,ok change alt but have batt drain .224 amps lights a #1616 bulb 1/2 way mil not on,pulled all fuses left of dash no changes,wheres a good place to go from here.Thanks in ad...
2002 Pontiac Montana 3.4L engine VIN: 1GMDX03E12
van was towed in for a no start has good fuel pressure and spark but no injector pulse thought it was in passlock but no security light on
2004 Saturn Vue Red Line 3.5L Differential grinds VIN: 5GZCZ63484
Hi there and thanks for the help with this one. I have the all wheel drive V6 Vue in that all of a sudden started making some really nasty grinding noise from the rear end like sheared off splines. THe car was towed in. It will not hold itself in park. The car...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Cadillac Eldorado 4.5L A/C Clutch VIN: 1G6EL1156J
Thanks for all the replies, this vehicle has been gone for 2 weeks now with no problems. The problem seems to have been the low pressure switch. We had replaced it with a new one ( GM OEM) and it was cycling the compressor at about 25 psi. After some research ...
1992 Chevrolet Astro CL 4.3L Hesitation VIN: 1GNDM15Z3N
hose on fuel pump inside tank wassplit causing pressure to bleed back to the tank. replaced hose and newfuel pump will inside tank . vehicle is running fine customer came by today for other minor repairs and still doing great. Trouble codes: 33 (map sensor signal voltage high vacume low).
1999 Chevrolet Tracker 1.6L Speedometer VIN: 2CNBJ1862X
Sorry for the delayed post. I was waiting to hear back from the customer. It appears the only way to correct the issue is with an aftermarket adapter. At this time, the customer has decided to use a GPS unit to verify their correct speed. Thank you both for yo...
2002 Chevrolet S10 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCCS19W82
After going a few more rounds with this truck I did a runing compression test and found at times the compression was good and others it would only hit 60psi. air tested cylinder # 1 and found the intake valve leaking. In the process of having the head repaired... Trouble codes: P0300 (Random Misfire).
2008 Chevrolet Silverado 1500 WT 4.8L transmission VIN: 3GCEC13C08
Thanks.. took to transmission shop, has 138,000 miles on truck. trans. being rebuilt. THIS GM HAS BEEN NOTHING BUT PROBLEMS.
2003 GMC Yukon XL 1500 SLE 5.3L Stall VIN: 3GKEC16Z23
Thanks to all that responded, after hooking up fuel pressure gauge and scanner I drove car for 3 days , several times and could not duplicate problem again customer will bring car back if it acts up again. Mark
2002 Pontiac Montana 3.4L awd light on VIN: 1GMDV13E32
checked things recomended-found 2 possible problems-valve asm.and controller.cust took veh to trade in.thanks for replies-mark
2004 Pontiac Grand Prix GTP 3.8L Stall VIN: 2G2WR52484
Thanks everyone got it fixed cleaned throttle body. Fixed it up hard to believe Trouble codes: P1000.
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