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Prev Professional Automotive Repair Technical Discussions for June 1, 2012
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L No Start, no injector pulse VIN: 1G4CW52L4R
Hello all-this buick is eating my lunch. car died on freeway. shut down and would not restart. in the shop it would sometimes restart for a second and die. security seems good-light illuminates and goes out when cranking. scanned pcm-it is commanding a pulse w... Trouble codes: P1361 (Ignition Control Toggle Malfunction), P0321 (Spark Lost----History Code), P1629 (PassKey2 Crank Malfunction)
1996 Buick Riviera 3.8L Brake pedal VIN: 1G4GD2218T
Evening group, Have my buddys' Riviera, problem is intermittently when pushing the brake pedal down slowly it keeps dropping to the floor and there is no braking felt throughout the vehicle until your damn near on the floor. Scary feeling when i first felt it....
2001 Chevrolet Monte Carlo LS 3.4L Starting VIN: 2G1WW15E71
hi there, i have a 1002 monte carlo that has a delayed start. fuses are good and relay is good. according to the schematic in alldata, the yellow wire in the ignition switch sends voltage to the pcm.(c2 pin 23 ppl wire)signal is ok. then the pcm is supposed to...
2004 Chevrolet Suburban 1500 LS 5.3L Cuts out, Stall, MIL Lamp on VIN: 3GNFK16Z04
truck came in fo intermittent stumble and stall code po336 rec cam and crank sensor cust agreed put sensors in had to replace cam because of bad sensor crank sensors still intermittently throwing the po336 checked voltage signal and low reference all seem ok t... Trouble codes: P0336
2007 Chevrolet Impala LTZ 3.9L compressor VIN: 2G1WU58R47
I have an Impala in my shop that makes a fluttering noise on decel ONLY with the a/c on coasting to a stop from about 35 mph to 5 mph. I also get an intermittant belt chirp when this happens. It sounds like the noise is coming from the compressor. otherwise th...
2003 GMC Sierra 2500 HD SLE 6.6L tempurature gauge says 240 degrees VIN: 1GTHK23193
First off let me say that this is my truck and that I am by no means a diesel tech. What I have going on here is that my truck is "overheating" according to the guage and my scanner. The temp gets to 240* after about 10 minutes of driving. Seems to get worse ...
2003 GMC Envoy SLT 4.2L air bags VIN: 1GKDS13S33
Customer stated the right rear air bag would deflate sitting just a short while, but would re-inflate quickly when truck was re-started. Has been doing this for about a year. Now both air bags go down, left slowly (overnight), but will re-inflate quickly. I ha...
2004 Saturn Vue 3.5L compressor VIN: 5GZCZ53444
this saturn came in not cooling good The low side is 70 at idle and the high is 150 if I raise the speed up to 2000 the low is around 55 and the high is around 175 the duct temp feels slightly cool with high rpm with the blower on low.The raditor fans are runn...

Fixes & Summaries for GM
Fix/Summary Answers
2005 Cadillac STS 4.6L engine mount VIN: 1G6DC67AX5
well since the front man put the estamite in we ate the additional labor time to avoid a problem.front man is now on a short leash..thanks to all who replied
1993 Chevrolet K1500 Cheyenne 5.7L Daytime Running Lamps / Autolamps VIN: 1GCEK14K1P
The customer had some tight time constraints so, this vehicle is shipped with working DRLs, but not by diagnosing and fixing the OEM system. We ended up installing a Blue Streak ET521 kit. This keeps the low beams on whenever the key is on, but still allows ...
1995 Chevrolet Camaro Z28 5.7L Misfire VIN: 2G1FP22P1S
I found a few vacuum leaks and repaired them but no change in the way it runs. Customer has taken it to drive. Thanks everyone for your help and thanks Gordon for your help. When I get it back if I find anything else I will let you know. Charlie
1999 Chevrolet Astro 4.3L oil consumption VIN: 1GNDM19W2X
Well as it turns out after talking to the customers husband the van is only burning 1 to 1.5 quarts between oil changes. The wife thought it was a lot more. They did say that it seems to burn more oil on long trips vs. just driving around town. The custom...
2004 Chevrolet Silverado 1500 5.3L Unknown VIN: 1GCEC19T94
Thank you to all the replies for this help. Great helps from Iatn and great people.Owner has no money and unable to pay for this diagnostic. owner pick up truck. Thank for all the advices, thoa [...]
1999 GMC K1500 Suburban SLE 5.7L Transfer Case VIN: 3GKFK16R6X
ARGHHHHH. I know the format for this forum is to post good results, but we weren't able to accomplish that. I just wanted to let the forum know our results (or lack of results). And I want to thank everyone for their comments. We tried everything suggested and...
1999 GMC K1500 Suburban SLE 5.7L No Start VIN: 3GKFK16R3X
I thank you ALL for your help in this fuel pump "saga". I have replaced the pump with an ACDelco unit, both relay and fuse for the pump. Checked voltages at the pump under load and amp draw, both are within spec. The most millage I got out out of a pump is 482...
1992 Oldsmobile Custom Cruiser 5.7L Cust states a/c comp stops intermittantly. VIN: 1G3BP8376N
Something about the pressures didn't feel right, so another set of gauges confirmed the a/c system is in good working order. 240-245 high side and 45 low side pressures. High side does not go over 245 when idling for extended periods, very stable pressures. Cy...
1999 Pontiac Montana 3.4L Mechanical VIN: 1GMDX03EXX
Ok guys. First things first, I would like to thank some of you who gave me a straight punch in the face about trying to make "quick cash". I appreciate the fact that you guys were only trying to help fellow technicians not to make the mistake of not diagnosing...
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