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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 24, 2006
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Open Help Requests for GM
Help Request Answers
1992 Buick Roadmaster 5.7L No Start VIN: 1G4BN5379N
i was requested to tow car to our shop on a no start first test was to spray fuel in tbi car started up ran till we removed fuel supply 2nd test fuel press. no press found tested pump relay no power checked wireing found that relay hot ran through oil press. s...
2002 Buick Rendezvous CX 3.4L Steering VIN: 3G5DA03E22
The Vehicle is getting a popping noise in the front suspension when turning slow. No Noises on straight ahead or normal driving. Checked everything possible. Is there anything that is common to these trucks or am I missing something. Thank You, Dan
1992 Chevrolet Corvette 5.7L No Start, Hesitation, Cuts out, Stall VIN: 1G1YY23PXN
car came in several times for intermitant stumble and die never got to act up in shop.finnally this time got to act up and got code for low resolution signal gone so we replaced dist ( delco) and still had same problem got to act up in shop and died and would ... Trouble codes: 16 (low resolution pulse fault), 42 (est error)
1993 Chevrolet K2500 Cheyenne 7.4L Misfire, BACKFIRES VIN: 1GBGK29N6P
Need some Big Block techs to help out here. Got this from another shop-starts right up when cold and begins bucking, backfiring, farting and generally runs like real crap. You can acellerate this throttle body unit radpidly and it winds right up, but when you ...
1995 Chevrolet C3500 7.4L fuel pump VIN: 1GTGC33NOS
I'm confused, and of course the customer wants the truck yesterday..so someone please tell me I'm crazy, or tell me there's actually something wrong. This pickup is very well maintained, I replaced the fuel pump, and filter last year. It came in with the compl...
1996 Chevrolet Monte Carlo Z34 3.4L Hesitation, Surge, Cuts out, Misfire VIN: 2G1WX12XOT
I have had this car for 2 days now. When I first drove the car it hesitated like it was lean and miss-fired badly under load. The customer just purchased this car last week and knows no history. I first suspected plugs and wires but when I checked I found they...
1998 Chevrolet Venture 3.4L head gaskets VIN: 1GNAX035WD
Vehicle diagnosed with bad head gaskets and seized engine by another shop. we were told customer overheated vehicle to the point that the engine shut down. We received vehicle at our school as a project vehicle. We were able to get the vehicle started, and cou...
2000 Chevrolet Silverado 1500 5.3L 4WD service light VIN: 2GCEK19T1Y
I've had an int. 4wd light on and off for about a month now. Finally was able to get a code from the truck. B2725-Active transfer Case mode switch fault. From what I can tell it is related back to the actual 4wd switch on the dash. I'm looking to see if thes...
2003 Chevrolet Malibu 3.1L keyless entry VIN: 1G1ND52J53
Hi guys. I have exhausted my resources on this one. (mod and internet search) The remote keyless entry (RKE) works normally except that the horn will not chirp when lock is pressed twice. The horn will sound in panic mode. Is this a programming or set user pre...
2005 Chevrolet Uplander LT 3.5L vibration VIN: 1GNDV33L35
I have a 2005 up lander that has Continental tire on it ( O E ) If the van sits for 12-24 Hours the tires have flat spots in them. This causes a Vibaration some days and a woble on others and nothing on others. GM and tire manufactor say this is OK. Have iform...
1997 GMC C1500 Sierra SL 4.3L Misfire VIN: 1GTEC19W2V
this truck has come to us from another shop, it belongs to a used car lot, it has a random missfire when accel, it starts to act up when cold at about 1500 rpm, hot at 2500 rpm, it does it both in nuetral and in gear, before we first saw veh, had the plugs, wi...
1999 GMC Sierra 1500 SL 5.3L Lighting VIN: 1GTEC19T5X
Customer states that at night the headlights will not come on even turning them on manually. We tested the system and it has been working properly for two days during the day and at night. For us at dark (or simulating dark) the headlights come on without the ...
2003 GMC C7500 6.6L Fuel,Oil,Volt, Temp Gages VIN: 1GDK7J1CX3
This Vehicle has no Temp,Volt,Oil.or Fuel gage Function,Tachometer works aswell as Speedometer,Vehicle was repaired at GM Dealer,along with another Truck of this Series,with Same problem. Was told fix was a Bad Connection;ie(Ground) wasn't specific. Based on m...
1988 Pontiac Grand Am 2.3L No Start, Poor Idle Quality, Cuts out, Stall, Misfire VIN: 1G2NE14D2J
Car came to us after several shops attempted to fix. Originally the car would just die intermittently going down the road. Then sometimes would have to wait 10 minutes to get car to restart. When got to me it would not start. Found code 42. testing found bad i... Trouble codes: 42 (est spark timing circuit)
1994 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE55M2R
Car towed in for no start. Found no spark to plugs. Module and coils checked out so I replaced crank sensor and car started right up and ran fine. I gave car to customer but they called me back very next day no start again. Again no spark, I heated coils, modu...
2000 Saturn SL2 1.9L trans temp VIN: 1G8ZK5279Y
Hello all, this is our first post, hopefully someone has seen the problem. This car continually sets a po714 - transaxle fluid temp sensor circuit intermittant. Basically there are no real diagnostics we can come up with, except that the pcm is seeing 10 degre...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal Custom 3.1L No Start VIN: 2G4WB54T5M
thank you all for your help and suggestions. we checked all of the injectors and there were 2 bad ones. vehicle also had a cracked crank shaft sensor. thanks again glenn
1995 Chevrolet Camaro Z28 5.7L No Start, Stall VIN: 2G1FP22P9S
after several days was able to get this to stall & not crank again bill [...] was correct it was an ignition switch intermittent contact causing the no start/no crank. i surmize the maf sensor code was from the intermittent power drop out as it has not occure... Trouble codes: 48 (maf system fault).
1996 Chevrolet S10 LS 4.3L 1-2, 2-3, 3-4, tcc VIN: 1GCCT19W9T
IATN did it again. You guys are great. I rechecked voltage at the pin on the transmission and i had 12.4 volts. When it acted up again, i had my meter with me and the fuse for the trans had 4 volts. Jumpered fuse to good 12v all the time fuse and shifts great....
1999 Chevrolet Tahoe LS 5.7L fuel leak VIN: 1GNEK13RXX
Sorry for the delay but i wanted to be sure it is fixed. The fix was to replace the fuel tank with a used unit. The lines were all installed correctly at the tank(some suspected that to be the problem-notit).This tank is plastic,has a rollover valve at both ...
2001 Chevrolet Express 2500 4.3L hard start VIN: 1GCFG25W51
I got many replies about replacing the cap and rotor, I did that and it fixed the problem. Many people mentioned the cap and rotor can look fine but still need replacing. One person mentioned that OEM parts last longer and will not 'tunnel' resulting in crossf... Trouble codes: P0128, P0300.
2002 Chevrolet Express 3500 5.7L Turn Signals VIN: 1GBHG31R62
Thank you to all who replied. The fix ended up being the multi-function switch and Flasher relay. Between the 2 we fixed the fast blink and both lights flashing outside when going left or right. Thanks again for all your help.
2002 Pontiac Grand Am SE 3.4L 4 way switch & flasher VIN: 1G2NF52E12
Got a lot of replies for this post! THANKS GUY'S! Everybody had the same points 'Changed the turn signal switch' And all of you were right it was the switch causing the feed back. However one post from Dan in Texas talked about a customer that came to him with...
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