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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 24, 2007
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Unknown VIN: 3G5DB03E52
Customer states at times nothing works radio locks up,loses head lights,no power windows.We just installed A new BCM a week ago.are there any other problems with these vehicals? Jon
1991 Cadillac Fleetwood 4.9L a/c panel VIN: 1G6CB53B2M
car came in no display on a/c control panel or fuel data center and loss of instrument cluster.pull in shop to which cluster worked,but ac and fuel did not.tested grounds,data wires,signal,all seemed good wondered if anyone has run in to this thanks!
1986 Chevrolet Corvette 5.7L Misfire VIN: 1G1YY0785G
Hello everyone and thanks in advance for the help...this vette is being a pain in the rear.This car has a distinct miss under load. when just cruising its fine but when you stab it its very noticable. im not sure if its spark or fuel thats doing it...it feels ...
1990 Chevrolet C1500 Cheyenne 5.7L Poor Idle Quality, Surge, Stall VIN: 2GTEC19K6L
had p044 lean o/2 /surg at idle with extented crank/ tested o/2 worked ok- fuel pressure at13psi good flow had rough idle cold. found bad intake gasket,engine would smooth out when spraying small amount of carb cleaner by intake to head, seepage of coolant out...
1992 Chevrolet S10 2.5L Hesitation, Misfire VIN: 1GCCS14A4N
1993 Chevrolet Corvette 40th Anniversary Edition 5.7L No Start VIN: 1G1YY23P4P
Vehicle starts and stalls or no start at times. All voltages and grounds ok. Sometimes vehicle has no communication. and will start on any key code. Trouble codes: 41 (ccm)
1995 Chevrolet Lumina APV 3.8L Misfire VIN: 1GNDU06L4S
weak or no spark at cyl #3&6 coil pack replaced ign. module,coil pack,crank sensor & cam sensor checked plugs and wires ok. will a computer cause this problem ? another shop installed a new harmonic balancer
1995 Chevrolet Monte Carlo LS 3.1L Hesitation, Cuts out, Misfire VIN: 2G1WW12M0S
Well this is my first post on IATN, So be gentle. This Car has me stumped let me give a breif explination of what I know and what I don't. The car develops a bad miss only when hot and only just above 2000 RPM that is not in the ignition system, I never loose ...
1995 Chevrolet Astro 4.3L turning wheel at stop VIN: 1GKEL19W5S
this vehicle has hydroboost and is tight when turning at a stop.checked front end and removed shaft from colum to box ok could box be problem ? also is awd thanks
1996 Chevrolet Blazer 4.3L Poor Idle Quality, Misfire VIN: IGNDT13W9T
Hi all. Thaks in advance. I have this Blazer thaat was towed in as a no start. The fuel pump was bad, we replaced with Delco and new filter. It has a miss in it that the customer says was there before also. It is a light miss at idle, enough to show on the mis... Trouble codes: P0300 (Random cylinder misfire)
1996 Chevrolet K1500 5.7L Poor Idle Quality, MIL Lamp on VIN: 2GTEK19KXR
any help appreciated, running out of ideas, am suspicious of aftermarket ecm & sensors as none of the parts are gm , had customer bring in all original parts he changed. idles very rough at idle driving down road seems fine no hesitation or surging. Trouble codes: 28 (trans press switch manifold problem), 35 (idle aircontrol motor problem)
1998 Chevrolet K3500 Cheyenne 7.4L No Start, Stall VIN: 1GBJK34JXW
The vehicle came in last week after it had stalled on the road. Diagnosed bad fuel pump. This vehicle has the dual tank setup with the balance pump and module that controls this the fuel sender was bad in this so the rear tank had a half tank and the front was...
1998 Chevrolet Cavalier 2.2L No Start VIN: 1G1JC1247W
Hello eveyone,first time asking for help. crank sensor broke off in block,besides pulling oil pan, does anyone maybe have some tricks on getting this out it almost came out,but now is flush with block. 2.2 nightmare. thank you
1999 Chevrolet Silverado 1500 5.3L Radio VIN: 2GCEK19T2X
Hi everyone! What really sucks about this one is it's my own vehicle, and without the stereo I can hear all the rattles!! Long story short, after 8 years my battery finally dies, I replaced it and have no idea what the theft-lock code is for the radio. Is ther...
2003 Chevrolet Suburban 1500 LS 5.3L No Start VIN: 3GNFK16T63
This vehicle was scheduled to come in for the door locks intermittingly cycling on and off while driving over bumps. It never made it in because on the way to the shop it died while driving. It was towed in and the next day I checked it the battery was complet...
1993 GMC G1500 Rally 4.3L stays in 2nd gear VIN: 1GTDG15Z2P
hey everyone and thank you ahead of time. the van first came in with an intermitent concern going into limp home mode, if you turned the van off and restarted it, then it would be back to normal. the van came from a tranny shop that "replaced" the transmission...
2003 GMC Sierra 1500 HD SLE 6.0L Cuts out, MIL Lamp on VIN: 1GTGK13U63
mil illuminates and dashboard reads reduced engine power. Happens completely intermittent. sometimes 20 times in one trip, sometimes none. Found tsb 03-06-04-032 and performed all relevant diagnostics to no avail. Wiring all test fine at tac and tbi. I relly d... Trouble codes: P1518
1994 Oldsmobile 88 Royale 3.8L Stall VIN: 1G3HN52L4R
Hi all, I have this 1994 olds that only acts up the first 1 to 2 starts each day. It will start then stall after about 1 second. Crank sensor waveform is good, and signal to pcm from module (3x) is good. Signal does not go away until car shuts off (crank stop...
1995 Oldsmobile Achieva S 2.3L interior lights VIN: 1G3NL55D0S
Vehicle came in for interior lights stay on with engine running, but will go out after aprox. 5 min. We also noted the lights will not go on with door switches, we tried all 4 just key on. The dimmer switch on the dash will only work after the lights have "tim...
1999 Oldsmobile Cutlass GL 3.1L compressor VIN: 1G3NB52J1X
the a/c compressor comes on and off at random times.when it stays on,it puts out nice cold air.high side pressure is not even close to excessive when it shuts down.it at times comes back on in a couple of seconds after shutting down.evacuated system and rechar...
2000 Oldsmobile Alero GL 2.4L door locks VIN: 1G3NL52T2Y
driver's door latch would not unlock mechanically. Had to remove door panel with door closed and get door unlocked and open. Customer returned today stating that doors no longer lock when car is put in gear. Tried another good known latch with same results. Re...
1997 Pontiac Grand Am SE 3.1L starts and stalls
Well I am here cause this car is kicking my butt. I have a problem as soon as I start the car it will run for about 5 sec then stall and flash the theft light. I have checked voltages at the pass lock sensor and hav a 5 volt ref on the yellow wire 12 volts on ...
2003 Pontiac Vibe 1.8L wheel brg. VIN: 5Y2SM64883
Hi there. It sounds like a right front wheel bearing noise, that is, it gets louder with left turn. I am not sure if it is a hub assy, like the other GM's or just a bearing that would require special tools like a puller or a press. I would like to be sure I kn...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Park Avenue 3.8L Driveability VIN: 1G4CW52K4W
Well it seems as though this puppy has a few random issues. One being the vacuum leak...which was corrected by replacing the upper intake and gasket. I am still dealing with the original issue however. I am going to chase the EVAP system next...look for some...
1992 Cadillac Fleetwood 4.9L compressor VIN: 1G6CB53B6N
Thanks to all that replied.Your input is appreciated.13 of the 15 replies were found to be very usefull.If I wanted critizism I would stay at home!This forum is intended to help the tech's not critisize them.If you have nothing helpfull to say, keep quiet.Than...
1978 Chevrolet K20 Cheyenne 6.6L Valve Cover Leaks VIN: JF3048JF04
Wow holy cow thanks Guys for all your opinions I am going to close this since I'm sure I will get the leak stopped I really thank you guys for your Idea's They will help every one thanks Again _john
1991 Chevrolet S10 2.5L No Start, no start, hot only VIN: 1GCCS14A2M
thanks for all your help. i had alot of responses to this one, unfortunately, we could not determine the cause of the problem for sure, and we ran out of time with the vehicle. once again, we want to thank all those who responded, its always a pleasure working...
1994 Chevrolet S10 LS 4.3L looses power VIN: 1GCDT19W8R
sorry took so long, could not get truck back into shop to finish,come to find out, my fuel gauge was messing up. put my digital one on and found low fuel pressure. DAMN! lost alotta time for a stupid gauge prob. replaced customers new fuel pump with gm pump. o...
1996 Chevrolet Cavalier 2.2L self test VIN: 1G1JC5243T
I need to close this request due to the time limit. We have not had a chance to fix this vehicle since the customer has not yet returned but I am pretty sure as most help request have suggested that one of the tone rings will be cracked causing the abs to enga...
2001 Chevrolet Express 1500 4.3L Not Sure VIN: 1GCFG15W31
Well I changed the tork converter and changed the filter and it is working great. Thanks for all the help Jimmy
2001 Chevrolet Express 3500 5.7L No Start, Poor Idle Quality, Stall VIN: 1CG1G25R11
Thanks to all that replied on this. I went to work today and found the van runs OK again. I went to the left upper contol arm area to check wiring on this van the only wiring harness there is for the trailer brake system. No other wires in that area. I removed...
2003 GMC Sierra 2500 HD SLE 6.6L trans VIN: 1GTHK29153
Client changed transfer case over weekend with a used one and everything works great.Problem fixed!!! Thankyou very much IATN and ecpecially [...] hit it right on.
1992 Oldsmobile 88 Royale 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, knocks on accel VIN: 1G3HN5312N
This car had an improper adjustment on the crank sensor. I was able to adjust it while the car was running. A little dangerous but it worked. Still can't explain the speedo moving, but the starting/drivability issue is resolved. Thanks to everyone who offered ...
2001 Oldsmobile Alero GL 3.4L security VIN: 1G3NL12E41
Customer is still running this vehicle but has elected not to do any repair now, due to the very intermittant nature of the problem. Thanks to all!
1993 Pontiac Grand Am GT 3.3L MIL Lamp on VIN: 1G2NW14N8P
Sorry about the long post but this system drove me nuts! This is what i have learned.Power from the fuse goes through the brake light switch to the tcc switch.This switch closes in second & third gear putting power to the tcc solenoid. The quad driver module h... Trouble codes: 26 (Quad driver module failure), 27 (2nd gear switch problem).
2000 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WK52J91
thanks to all for the help i replaced the canister vant solonoid and test drove over 100 miles and light is not coming back before it would come back at about 50miles some we have this one fixed thanks for all the help hope i can help you at sometime Trouble codes: P0440.
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