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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 1, 2005
International Automotive Technicians' Network (iATN) - Members Only
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Open Help Requests for GM
Help Request Answers
1983 Cadillac Eldorado 4.1L brake fade to floor VIN: 1G6AL5783D
brake pedal goes to floor. blocked off brake hoses at rear, there was no change. blocked off rt front,pedal got better. blocked off lf, got a good pedal. pulled calipers off and ck pads ok. i took piston out on rf. found nothing wrong. good flow out both bleed...
1994 Cadillac Seville SLS 4.6L shifting VIN: 1GGK552Y9R
vehicle was brought in with trans shift always in second gear charging system was repaired first due to p016 could cause trans to default to second gear. po29 shift solenoid b fault addressed removed pan and found solenoid b cracked and filter moved partly out...
1995 Chevrolet Monte Carlo LS 3.1L Stall, MIL Lamp on VIN: 2G2WW12M6S
this car came to me as a no start/stall problem with the mil on code 34 ran test replaced pcm didnt fix showing 0 volts on map circuit even though 5 volts going to sensor and signal return and ground test ok can go direct to signal return wire at pcm with powe... Trouble codes: 34 (map circuit low voltage)
1998 Chevrolet C1500 Cheyenne 5.0L No Start, Surge, Cuts out, Stall, Misfire VIN: 1GCEC19M9W
truck if driving me nuts...it very hard starting, most time have to use carb cleaner to start, checked all sensors with a snap on modus and all sesors are in range checked fuel pressure and its above 50psi even when acting up and under load..its poping back th...
1998 Chevrolet Blazer 4.3L Blend Door VIN: 1GNDT13W4W
Car came in with heater/a/c oscillating between hot and cold. After moving the temp control a few times, it just went to full hot. Replaced the ECC control unit and still hot all the time. I don't do much GM work so I don't have the scanner to pull codes. Sea...
1999 Chevrolet K1500 Suburban 5.7L tcc pwm code 1860 VIN: 3GNFK16R2X
2000 Chevrolet Astro 4.3L Surge, No power VIN: 1GCDL19W8Y
Van has no power and surges at 1/4 to 1/3 throttle. There are no codes. All pids are within norm. I have a sister van to compare values with they are the same. Fuel pressure is over 60+ psi but replaced fuel filter, I exchanged mass air flow, computer with no ...
2001 Chevrolet Monte Carlo SS 3.8L air bag system VIN: 2G1WX15K01
Good Morning Techs, I'm not familiar with air bag circuits and their codes so I'm asking for info. from all of you on this one. This car was bought used by a friend of mine about a month ago. All was fine until about a week ago when the air bag light started c...
2001 Chevrolet S10 4.3L Poor Idle Quality, Stall VIN: 1GCCS19W31
Hi Folks, This 2001 Chevy S-10 pick up came into our shop with a rough idle & stalling problem. Removed EGR Valve to verify its operation & make sure nothing was keeping the EGR Pintle open. Removed IAC assembly, cleaned air by-pass and throttle body with car... Trouble codes: P0506 (Low Engine Idle)
2003 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Stall VIN: 1GCEK19T33
thanks in advance for your help. vehicle came in with a very low idle. 250-350 rpm. no codes found. no tsb found. idle is smooth, just too low. scanner shows no unusual readings from sensors, etc. drives fine but will stall a lot when coming to, or waiting at ...
2002 GMC Envoy SLE 4.2L No Start VIN: 1GKDS13S22
I have this 2002 envoy that is really troubling me. Initially when the vehicle came in after diagnoses the conclusion was that the throttle body was bad. After changing the Throttle body The vehicle started up and idled beautiful for a few minutes then it shut...
2002 GMC Envoy SLE 4.2L Keyless Entry VIN: 1GKDS13S82
The keyless entry is inop. Cannot communicate with body module.With MODIS, we get u1000 code.With Tech 2, no response from any module but PCM. All fuses ok. Tried to re sync key fobs, will go into programming mode(hold unlock, cycle key twice,horn honks twice)...
1999 Oldsmobile Intrigue GL 3.5L blower motor VIN: H5XF371246
Hi guys, I'm hoping someone might be able to offer some help with this one. This vehicle came in for the blower motor inop. After checking it out found the high blower motor fuse (25A) blown. It would blow the fuse as soon as you replaced it. We replaced the m...
2000 Pontiac Grand Prix GTP 3.8L shifter VIN: 1G2WR5211Y
Hi guys..Got this Grand Prix here...original complaint from customer was that he could not get key out of ignition and that he could not shift from park without using shift interlock bypass. We replaced complete center console shifter assembly and now the key ...
2001 Pontiac Grand Am SE 2.4L steering box VIN: 1G2NF12T71
hello gentleman;this car makes a pop noise in hard turns left or right hand turns only when going very slowly,Ive heard that the lower control arms can make this noise . I would realy like to make an accurate diagnosis,but the car has to be on the ground and t...
2002 Pontiac Grand Am SE 3.4L security light flashing VIN: 1G2NF52E72
9-01-05 vehicle towed back in, no crank, security light flashing. checked for codes. p1189 and b2960. using the tech 2 went through looking at data, still not totally fam. with the tech 2, didn't find anything that would help me. then tried to crank vehicle an...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Regal LS 3.8L turn signals VIN: 2G4WB52K4W
the first day i worked on this vehicle i was convinced it was a voltage drop problem.i spent most of my time looking for bad grounds.after extensive testing of the grounds,i came home that night & put in a request for help on the iatn.back at work the next day...
1997 Cadillac DeVille 4.6L No Start VIN: 1G6KD54Y6V
Thanks for all the help, Like many of you had said, it was the security system that was causing the no injector pulse condition. I checked for codes in the bcm and I had a code for the security system. I ran throught the relearn process which was to turn the k...
1999 Cadillac DeVille 4.6L abs VIN: 1G6KD54Y5X
Thanks to all who responded. Just like many GM SUV's, the module is quite susceptible to water damage, as was the case with this car causing erratic operation of the ABS motor. We've replaced the module (nearly $800)and have had problem free operation.
1978 Chevrolet C30 Cheyenne 7.4L starter VIN: 1GTDC14C2C
the cast starter did it, thanks to all that replied I even had to shim it. the cast noise was very diffrent then all the aluminum ones. I had to get the shorter starter bolts to. thanks again everybody
1989 Chevrolet Celebrity 2.8L No Start, Stall VIN: 3G1AW51W2K
hello-i had alot of great responses-that was nice to see-we bit the bullet and pulled the intake plenum and checked all the injectors-they read below specs. about half or more-anywhere from 4 ohms-to-7 ohms-we came to the conclusion that after running they wou...
1995 Chevrolet K2500 Cheyenne 5.7L Excessive Emissions, Poor Fuel Economy, Extreme Rich Run Con VIN: 1GCFK29K4S
First off I would like to thank the 7 Technicians that answered my call for help and all 7 were basically right. I used Rick [...] method of valve adjustment, and as he told me it is fool proof. Mitchell says to take the lash out of the rockers and adjust t...
1997 Chevrolet C1500 Cheyenne 5.0L Distributor VIN: 2GCEC19M2V
I got great replies from 31 guys. Im suprised I have never run across this fix before. Setting the dist with the scan tool is a snap. Oh also the TPS was bad and causing all kinds of performance issues including shifting at the wrong points and extremely flat ...
1999 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R9X
thanks for all the help everyone. it turn out to be the distrubutor. Trouble codes: P0141, P0161, P0300, P1345.
1999 Chevrolet K2500 5.7L Misfire VIN: 1GCGK23R0X
I received many good possible fixes for this problem. Fortunately for the customer it was relatively cheap. As some of you suggested the O2 sensor was the culprit. Although the truck never had the misfire reappear I did notice with the scanner that the downstr...
2000 Chevrolet Malibu 3.1L lacks power VIN: 1G1ND52J3Y
Sorry about delay in closing,has been scary busy lately at work.My customer is not interested in repairing a almost inaudible engine noise!Story is sometimes I can't see the forest for the trees.I am a little embarrassed that I never noticed the knock retard v...
1999 GMC Sierra 1500 SL 4.8L Anti-Theft VIN: 1GTEK19V5X
First of all i would like to thank everybody for there replies. Without your help i would not have been able to fix it. The problem with the truck was the BCM was pulling the computer data to ground. Once the BCM was unplugged the computer data was returned. I...
1991 Oldsmobile 98 Regency Elite 3.8L Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy VIN: 1G3CW53LM4
As many members suggested I replaced the coil pack and module. I had tried this before, but the grounds under the module were corroded. So after lots of cleaning and replacing the module and coil packs, the car is running great again.
1995 Oldsmobile Silhouette 3.8L Surge, BUCKS VIN: 1GHDU06L65
sorry it took so long to post this.car was finally taken back to used car lot and sent to auction!if i had had a dyno i might have isolated problem.we checked eveything that had been suggested,installed new plugs and wires.scoped ck'd tps and vss while road te...
1997 Pontiac Bonneville SE 3.8L belt noise ? VIN: 1G2HX52K3V
first i want to thank everyone who replied, 7 of the 12 replies hit the nail on the head. it was the pcv valve, replaced and she has driven car for three days and no noise. i don't think i would ever have found this one without all your help, once again 'IATN'...
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