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Prev Professional Automotive Repair Technical Discussions for October 19, 2006
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Open Help Requests for GM
Help Request Answers
1993 Buick Park Avenue 3.8L heater core VIN: 1G4CW53L6P
Someone please help me. This car is driving me crazy. I have replaced the heater core 6 times in the last 6 months. They keep leaking from the seams. I dont think that electrolysis would do this normally that would make a pin hole. However I have flushed the s...
2002 Cadillac DeVille 4.6L Poor Idle Quality, Misfire VIN: 1G6KS54Y01
Hello all, I did an engine swap because customer was complaining of excessive oil consumption. The dealerhip obtained a used engine. I installed it, had a huge coolant leak into a combustion chamber. They obtained a 2nd used engine from a second source. I ins... Trouble codes: P0305
1995 Chevrolet K2500 Cheyenne 6.5L Excessive Emissions, Cuts out, MIL Lamp on VIN: 1GCGK24F4S
Diesel guys, I have an intermittent problem with this truck. When it is acting up it will be idling normally and will just shut off (no stumble,just like the key was shut off). You can immediately start it back up with no problem, then a minute later it will ... Trouble codes: 19 (crank sensor fault), 18 (pump cam reference pulse error), 17 (high resolution sensor fault), 35 (inj pulse width error short response), 54 (tio fault), 65 (accel pedal position fault)
1996 Chevrolet Astro 4.3L Poor Idle Quality, MIL Lamp on, low power VIN: 1GCDL19W6T
veh will start to missfire and count on cyl #1, 3, and 5 when you are driving and will ping bad if trying to accel. the pcm will start to remove fuel untill the misfire counts turn the check engine light on then it will run ok.if you are sitting at idle it wil... Trouble codes: P0300, P0175
1998 Chevrolet Astro 4.3L Stall VIN: 1GNEL19WXW
Hello. I got this Astrovan in due to stalling when coming to a stop. I checked for codes and found codes for rich exhaust P0172 and P0175. I road tested the vehicle for about an hour with no stalling at all. Vehicle ran very well. I hooked up a fuel pressure g... Trouble codes: P0172, P0175
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1941W
GM Guru's This truck fails the O2 sensor switch test. Looking at the O2 sensor on a Labscope the voltage readings go below .1v and above .9v and has a switch ratio of 3Hz at 2000 RPM's. During the testing of this truck the switch counter never came off of 1. ... Trouble codes: P1133 (Insufficient Switching Sensor 1)
1999 Chevrolet C2500 5.7L don't know VIN: 1GBGC24R9X
brakes are pulling to the right when applied, we bleed the system manually & also bleed the abs with the tech 2, also did function test on the abs, no codes etc. all test passed.
2000 Chevrolet Prizm 1.8L heater blower VIN: 1Y1SK5282Y
the hvac blower runs at a low speed on the off position. the coustomer states that it did not do this until we replaced the blower resister.when the car came in the first time the blower only ran on the high position,that is why we replaced the resister.can an...
2000 Chevrolet Venture 3.4L MIL Lamp on VIN: 1GNDU03E1Y
This 2000 venture van has a p0446 code.When cleared comes back w/in 2-3 ignition cycles.checked all fuses,hoses,electical conections etc. all ok.tried to operate vent and purge solinoids w/scan tool keep getting a message sys.vaccum too high,and scan tool kick... Trouble codes: P0446 (evap sys.vent control malfunction)
1996 GMC K1500 Suburban 5.7L Hesitation VIN: 3GKF16R6TG
This one has me pulling hair out...and I don't have enough left to do that! I hope someone can help me see what I'm missing. The symptom on this one is very hard to duplicate, and it only acts up for a few seconds when it does act up. I drove this vehicle abou...
1972 Oldsmobile cutlass 350CID comming out of storage VIN: 3J57K2R175
What I have here is a 1972 Olds. Cutlass Supreme that the cust. is bringing out of storage. He parked it about 5 years ago, he had put a plastic bag over carb. and had removed fuel tank. He has new gas tank, new sending unit, new fuel lines, new master cylinde...
1997 Oldsmobile Aurora 4.0L coolant loss VIN: 1G3GR62C5V
Customer has overheating problems.After thorough testing it was decided the head gaskets needed to be replaced,but turned into a engine job because the threads came out with head bolts. We still have the same problem we startd with, car overheats in a week or ...
1991 Pontiac Grand Prix SE 3.1L Hesitation, Cuts out VIN: 1G2WJ54T8M
This car has a cutting out condition when the rpms [...].I scoped my crank sensor and it looked good but being it was original I opted to change it any way but no good.I then checked fuel pressure and found it to be at 34psi with very little volume so I ch...
1997 Pontiac Grand Am SE 3.1L alternator VIN: 1G2NE52M9V
Vehicle came in originally with new battery & not charging. We replaced alternator, charged & tested battery - all good & charging 14.8 volts. 1 week later customer back in with batt light on. Vat test - not charging. Have alt tested - bad. Install another - i...
2000 Pontiac Grand Prix GT 3.8L Cuts out, Stall VIN: 1G2WP52KSY
Hey guys just thought I would burden you with my problem, any help would be great. Customer brought car in with complaint of intermittent stalling and cut out at highway speed (70-100km). Confirmed with road test car stalls at idle or low speeds and cuts out i...
2005 Pontiac Grand Am SE 3.4L Dask lights & starter VIN: 1G2NE52E45
Got a 2005 Grand Am in that the people said they had to jump to start the last few times they drove it. I went to start it and NOTHING happened. I did a battery test and found the battery to be good. I pulled the starter off and tested it in the bench and it s...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L SDM module VIN: 3G5DA03E02
customer returned after va-ca. I finished diagnosing and repairing vehicle. I removed dash cluster and sent out for brightness issues, not sure if had anything to do with floating communication faults, but proceded. Installed cluster and now U1088(SIR Mod.) fa...
1993 Chevrolet C1500 Cheyenne 5.7L Excessive Emissions, Poor Idle Quality, Poor Fuel Economy VIN: 1GCDC14K9P
Gentelmen: I am gonna call this a fix due to the fact that we have finally nailed the problem down. A special thanks to Bill [...] That got us thin...
1997 Chevrolet C1500 4.3L Poor Idle Quality, Hesitation VIN: 1GCEC14W7V
Sorry for the late response and also for the conflicting info. I'm closing this post for my employee. The problem was with the fuel gauge module (part #[...] - under dash) shorting out the computer as Gregory from IL and Pete from WI later suggested. We had... Trouble codes: P0122, P0046, P1122, P1406.
2000 Chevrolet Metro LSi 1.3L Airbag Light VIN: 2C1MR5229Y
After going over everything again I could not find the fix and turned the car back over to the customer. They decided to take it to a local dealer, who in turn has not been able to find an answer. If I ever hear that a fix was found I will amend this post.
2005 Chevrolet Silverado 2500 HD 6.0L brake pedal VIN: 456RSDF464
Couple of replies said this was normal, so I talked to GM tech my self and he also it is normal. Thanks for the help everyone.
1995 Geo Tracker LSi 1.6L Excessive Emissions, No Start VIN: 2CNBJ1867S
thanks guys,after looking ad the database i found one that had simmelar problems,when we put the timing belt back on,we alligned the mark on the cam pully with the valve cover mark,that is what alldata shows you wrong! it is the pin in the cam shaft that has t...
2003 Oldsmobile Alero GL 2.2L No Start, Stall VIN: 1G3NL52F03
Well everyone all I can say is we go to school everyday!!! I may not have made myself clear when I said I have no communications with the scan tool. The scan tool does power up and can build a vehicle but it couldn't comm. with anything on the vehicle. All per...
2002 Saturn Vue 3.0L MIL Lamp on VIN: 5GZCZ63B32
Sorry about the late response in posting the fix, but I wanted to make 100% sure that it was fixed before I posted. The fix on this one was to do the recall, retorquing the lower manifold bolts(they were really loose) and installing the spings. Thanks to all t... Trouble codes: P0507 (idle too high), P0171 (bank 1 lean), P0174 (bank 2 lean), P0300 (misfire), P0303 (cyl 3 misfire), P0304 (cyl4 misfire).
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