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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 23, 2006
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Open Help Requests for GM
Help Request Answers
1998 Buick Regal LS 3.8L starter VIN: 1G3WH52M3S
car will not start unless you turn on the head lamps.and afterwards if you turn the headlamps off or turn either directional the car stalls as well as the dash lights and gauges flicker and sweep.if the daytime running lights are on car starts but stalls if yo...
2002 Buick Rendezvous CX 3.4L AWD Diabled VIN: 3G5DB03E02
Vechicle came into shop with AWD Diabled Light on Dash lit Checked for codes and are none I read in owners manual about Burnt Rear Differential fluid so I changed It Had Been clean Looking and Full when I started If Anyone could be of Help i would be greatfull...
2000 Cadillac Escalade 5.7L carpet VIN: 1GEYEKK63R
this is my vehicle i noticed that the drivers floor is always wet checked the a/c vents and drain no water from them. looked up into the fire wall to see if i can see water marks, nothing . i,m getting ready to lift the carpet but i wanted to try you guys firs...
1997 Chevrolet Lumina 3.1L Poor Idle Quality, Surge, Stall VIN: 2G1WL52M3V
originally car came in for extended crank time & strong gas smell . after checking grounds & replaceing coolant sensor (broke at base), put in used computer,was ok for 2 weeks now it will stall on customer while cruising ,starts right back up but may idle roug...
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.
1999 Chevrolet K1500 Suburban 5.7L jerk at cruise VIN: 2G3WX36X3U
This vehicle came to our shop with an external leak from the intake gaskets. The gaskets were replaced. After distributor adjustment to correct cam/crank corellation error the vehicle was road tested which brought about multiple misfires. A full tuneup was com...
1999 Chevrolet Blazer 4.3L Encoder Motor VIN: 1GNCT18W6X
Truck comes in for inop dash indicator lights for 4x4. Find blown ATC fuse, replace fuse, and road test. All seems ok. Customer says lights out again and brings back truck. Upon testing, find that with encoder motor unplugged, ATC fuse will not blow. Replace m...
2000 Chevrolet Blazer LS 4.3L Lights VIN: 1GNCS13W8Y
Customer brought vehicle in to the shop saying that while driving, the radio display and headlights will dim and flash rapidly. I thought it was a bad diode in the alternator so I unplugged the alternator and the symptoms continued. I am not sure where to go n...
2000 Chevrolet C3500 5.7L driveability VIN: 1GCG24R34Y
this vehicle has my mind fried. this is a two part question. 1. after i changed the spark plugs, cranked it up still ran bad, hooked scantool up and monitered data screen. every thing looks good except the 02s arent switching and staying rich, if i press the t...
2002 Chevrolet Impala 3.4L Headlights VIN: 2G1WF52E32
After starting headlights will sometimes delay for 5 minutes in automatic mode. Headlamp switch will not override. Have checked/tested relays and replaced BCM. Only happened once in shop, but was too fast to test.No codes TechII data looks OK any ideas. Thanks
2003 Chevrolet Impala 3.4L Rocker arm bolt VIN: 2G1WF52E13
This car came in with a misfire and engine noise. Pulled valve cover and found intake rocker arm on #6 cylinder pulled loose from head. The threads in head were gone. We drilled and helicoiled the bolt hole and reinstalled. Everything fine for about 1 month an...
1990 Geo Prizm 1.6L No Start VIN: 1Y1SK5463L
this one cam in on a hook. checked for check engine light on start up was none. i checked powers and gounds thought they were all there so i replaced pcm. i was wrong.. chedck power on circuit open relay did have it for a bit. so i checked the efi relay didnt ...
1996 GMC Jimmy 4.3L shift assyl VIN: 1GKDT13W3V
Hello everyone. I have a 96 Jimmy in the shop with a shifter problem. The Truck will not come out of park. I took aprt the console and found the lock solinoid assyl will move but it wont push out of the way far enough to let the release come unhooked. there is...
1999 GMC Sierra 1500 SL 5.3L batt light,fuelgauge,gear shift indicator, VIN: 2GTEK19T5X
I have a flashing battery lamp and an inoperative fuel gauge. also there is on no shift indicator. On the dash it says prnd321 but gives no indication of where the shifter is. I have power to the transmission on circuit 1020 and the ignition 0 fuse. Scan tool ...
2001 GMC Jimmy SLE 4.3L turn signals and interior lighting VIN: 1GKDT13W81
The turn signal flasher clicks even with the turn signal in the off position with the key on. The interior lights only go off when you use the over ride switch. We tried a new flasher and that did not help. Maybe their is a GM person out their that has seen th...
1993 Pontiac Grand Prix GT 3.4L door locks VIN: 1G2WP14X8P
vehicle has no factory transmitter for the door locks. cust stated it didn't work for a long time. had a "viper" remote start installed at a local stereo shop that worked for a few days.(we also install these units and are familiar with them) we replaced the l...
1997 Pontiac Grand Prix GT 3.8L Unknown VIN: 1G2WP12K1V
This car shifts from 1 to 2 fine then the 2 to 3 shift won't happen unless you let off the accelerator and the same with the 3 to 4 shift if you let up on the gas it will shift into 4th and go on down the road it seems to pull good and downshift ok. I just nee...
1999 Pontiac Grand Am SE 3.4L speed sensor VIN: 1354345213
hey, 99 grand am abs light on tc light on. codes showing are c1225, c1221, c1233, c1232, c1293, and c1291. is there a common connector or area on these cars that go bad? checked all fuses, new wheel bearing is fine.
2002 Pontiac Sunfire SE 2.2L Fan opperation VIN: 1G2JB12472
Radiator fan cycling when scan data is at 168 'f, on and off. Fan actuation is not regular but it it acts like it would if temp was really 222'F to 208'F. Scan data agrees with actual temp provided by infra red thermometers. Functional test using Solus is back...
2004 Pontiac Sunfire SE 2.2L engine VIN: 1G25B12F74
After engine sits for over 2 hours, engine has a noise when first starting, otherwise no noise present. Noise sound like a possible timing chain tensioner is loose before it builds pressure. Customer complains that noise will last for 10-30 seconds. The lenght...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Cadillac DeVille Concours 4.6L spec's VIN: 1G6KF52YXR
Thankx to everyone. All were correct! Eng. codes and leak issues. I've found a 'crack dealer' type of person, who don't care. As long as it looks good. Sold! Thank You all. -Thom
1997 Chevrolet Blazer 4.3L r/f suspension VIN: 1GNDT13W8V
Thank you for all of your helpful responses (24 of them). Some of your suggestions, I had already addressed, others, like checking the hood hinges, I would have never thought about, what a great idea, and yes, I re-torqued all the A-arm bushings. I checked e...
1998 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 1G1JC5241W
thanks for the help guys. i actually found that this car had a bad starter that would intermitently glitch in the middle of cranking and cuase a false crank sensor code. thanks again Trouble codes: P0335, P0342.
1998 Chevrolet K2500 Cheyenne 5.7L No Start, Poor Idle Quality VIN: 1GCGK29R1W
Thanks to all that replied the problem that I finally found was aweak valve spring which would foul up the air flow and mixture to several others. As for the reason that it would not run was an inefficent battery combined with the weak valve spring. Ifinally f...
1999 Chevrolet Tahoe 5.7L Radio, Speakers VIN: IGNEK13R8X
Well we fixed it! After many unpaid hours of disassembly and checking every inch of harness and all connectors. It was a intermittently shorted rear roof speaker. Replaced only that speaker and all is well, finally! Thanks for all the help. Some replies said i...
1999 Chevrolet Express 1500 5.7L Transmission VIN: 1GCFG15ROX
Had some computer problems which caused the delay in posting the fix. I failed to mention I was posting the problem for a friend who has a tranny shop. He told me there was alot of metal and clutch debris in the valve body. An exchange tranny was installed to ...
2001 Chevrolet Silverado 2500 6.0L Misfire, MIL Lamp on VIN: 1GCHK29U41
Thanks for all the replies, Chris and John hit it on the head. There was no actual miss a simple crank variation relearn took care of the problem. After doing the relearn there were no missfires showing and driving it on the express way was fine. Thanks again ... Trouble codes: P0300 (Random Missfire).
2002 Chevrolet Venture LS 3.4L No Start VIN: 1GNDX03E42
Thanks for all the replies! This was a strange one. Most of the replies refered to the bulkhead connector under the drivers seat. Since this vehicle was modified for handicap access and a wheel chair, that harness was removed. Eldorado National was the company...
2002 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK52842
Im sorry it has taken so long to post this fix. Had some family issues to resolve. But anyway i took everyones advise and replaced the canister with all the valves. Car came back in a week later all moniters set and no check engine [...]. Anothe car fixed than... Trouble codes: P0446 (evap emission vent control).
1996 GMC Yukon SLE 5.7L brake pedal VIN: 1GKEC13R2T
Well, After god only knows how many hours and how much brake fluid were spent on this truck it is cured. I would especially like to thank Chuck [...] (I hope I got that last name right) They both wrote to tell me they went through the same...
1999 GMC Yukon Denali 5.7L Interior lights VIN: 1GKEK13R0X
Thanks to all that replied esp. Jeff [...] who took the time to fax me the corrcet diagram & diagnostic tree. Found out that I had the info on Alldata but to late of course the diagnostics for this problem a very straight foreward. This is very easy to diagno...
1998 Pontiac Grand Am GT 2.4L MIL Lamp on VIN: 1G2NW12T9W
thank you for all the responses after monitoring tho O2 voltages and seeing them mimmick each other I decided to go ahead and replace the cat and it did fix the problem the rear 02 voltage fluctuation was much slower with the new cat installed thanks again
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