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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for August 18, 2009
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Open Help Requests for GM
Help Request Answers
1994 Buick Park Avenue 3.8L Cruise Control VIN: 1G4CW52L2R
I am trying to fix the cruise control. I have replaced the servo to no avail. Sometimes it will set and function normal. Other times it will not set. I watch the servo position on the scanner and the pcm will command the servo but the servo will not move. I ha...
1995 Buick Park Avenue 3.8L No Start, Stall VIN: 1G4CW52K8S
this car came to me on a hook, customer complaint was car would start and run about 15min and die. wait a few minutes and would do same thing. finally was completly dead. my first check found no crank rpm and no mass air flow reading during crank. checked wiri... Trouble codes: P1350 (ignition control opperation), P1361 (ignition control trigger malfunction), P1406 (egr pintal possition malfuction)
1990 Cadillac Eldorado 4.5L Mechanical VIN: 1G6EL1334L
Still has R-12 in system. Has a SLOW leak that I can not find. Takes about 2 months to loose enough refigerant to turn the low refg. indicator on and the computer turns the compressor off. Had dye in it for ever. Leak tested it with leak detector many times. W...
1994 Cadillac DeVille Concours 4.6L No Start VIN: 1G6KF52Y4R
Hey guys, got another fun one for ya. I have this caddy that came in for a crank no start. Tested and found fuel pump to be faulty. Replaced fuel pump, filter and pump relay, but to no avail. The vehicle still will not start. Checked connector and when key is ...
2006 Cadillac SRX 3.6L timing chain VIN: 1GYEE637X6
We pulled codes, and noticed a very ominous sound while cranking engine, of no compression. Checked one cylinder and read 50 psi. Codes were p0011, p0017, p0564, p0008, p1011, p1013. Codes indicated both bank 1 and bank 2 camshafts out of sync or not in park p...
1968 Chevrolet Corvette 5.4L Wiper VIN: 194678S406
We are having a devil of time getting the wipers to work. The motor works on the bench but not in the vehicle. We are familiar with the wiper relay, wiper cowl safety switch and ground issues. I think I have the wrong wiper motor installed on the vehicle. Th...
1995 Chevrolet Lumina APV 3.1L Alternator VIN: 1GNDU06DXS
We can not get this vehicle to produce a good voltage at idle. With all the accesories on (wipers on, blower on high, lights all on, and in drive), it will drop to around 11.5 volts at idle. Get the idle up to around 1000 rpm and everything is good. Does any...
1998 Chevrolet Corvette 5.7L Accessories VIN: 1G1YY32G2W
good evening, several weeks ago we got this vette tow to use because when the car moved over 2 mph the engine cut off.the message said steering column lock malfunction.now according to tsbs this needed a update on wiring and parts.we installed the parts and ev...
2001 Chevrolet Venture LT 3.4L power sliding door VIN: 1GNDX03E71
1 have 2001 chevy venture with power slidingdoor.when the door is closed manuel its fine.when i open it from the power door switch opens all the way,when i press the button the close it door wants to close comes half way down and opens again.its like something...
2004 Chevrolet Trailblazer EXT LT 4.2L Poor Idle Quality, Stall VIN: 1GNDS13S84
This trailblazer has had a rough idle and an intermittent stalling problem for a while. We have cleaned the throttle body and reflashed the PCM with all the latest updates. Came back with same complaint but added that the AC seams to speed up on its own. It is...
2000 GMC Sierra 1500 SLE 5.3L No Start VIN: 1GTEK19TXY
I have a 2000 GMC Sierra that will not start. Fuel pressure, injector pulse, and spark are good. The truck fires initially, but dies immediately. There is no security light on and I have gone through the passlock programming sequence (30 minute version) withou...
2001 GMC Savana 3500 5.7L Engine VIN: 1GDFG15X73
Hello. I worked on this van some time ago. I did a intake gasket and tightened the litters. It started up and ran great. The guy drove it around for awhile then he took it for a several hour drive when his engine stops working. Eventually he got it towed somew...
1998 Other GM p30 chassis 350CID Engine VIN: 1GBHP32R8W
We have a 98 Chevy p30 chassis here with a grumman-olson aluminum body on it. The motors shot and we were just looking for some opinions as to the best way to R+R the motor. It doesn't look like it's possible to pull it out the top. In the past we have pulled ...
2006 Pontiac G6 3.5L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on, no throttle input VIN: 1G2ZG55876
customer dropped of vehicle and left the following info: *check engine light on *after starting car, RPMs redline then it idles down *once in awhile it will start then die almost immediately *strangest behavior is that after i put the car in gear, the disp... Trouble codes: P0030, P0036, P0050, P0056, P0068, U0107
2007 Pontiac Torrent 3.4L no elec assist steering VIN: 2CKD173F87
All fuses are good, has code U0131- lost communication with the power steering control module. Has ECM codes p0689 - engine controls ignition relay feedback circuit low///p1682 -Ignition switch circuit fault ...ALLDATA has very little info on this system..has ...
2007 Pontiac Torrent 3.4L steering angle sensor VIN: 2CKDL63F27
customer complaint is no power steering scan modules with a modis and abs module has code c0460 check data stream and steering angle sensor stays at 0 reading and does not change. i have voltage drop tested power and grounds to the power steering control modul...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Century Custom 3.1L instrument cluster VIN: 2G4WS52J23
Thank you to those 12 people who responded to my help request.Special thanks to John [...] for the detailed explanation of the pass key system and how to reset it. Most suggested ignition switch and some even told how to check for proper voltage to switch.The...
1992 Chevrolet K1500 WT 4.3L valve train VIN: 1GCEK1427M
thanks to all who replied, was able to knurl stud, drive back in and by removing ignition coil was able to cross drill and install roll pin, i dont know why i didnt remember this as i pinned many studs in stock class racing engines back when us poor boys could...
1996 Chevrolet Cavalier 2.2L Poor Fuel Economy VIN: 3G1JC5242T
i apreciate all the techs to help me in this problem,i check all sensor especialy map sensor 107,108,and since i change the computer,that reading map sensor at idle was about 258.to 300.went down to 100 minivolt.and black smoke went out mmotor working good...
1999 Chevrolet S10 LS 4.3L MIL Lamp on VIN: 1GTCT19W4X
thanks to all replied. lab scope showed clean signal from cam sensor, but replacing the "murrays" part returned the tach signal and repositioning the dist gear 180 deg allowed the retard to be set correctly. IATN truly worthty Trouble codes: P0340.
2001 Chevrolet Blazer LS 4.3L No Start VIN: 1GNDT13W91
Thanks again for all the help, i received 30 replys, all said the fuel pump was bad all were right.
2002 Chevrolet Cavalier 2.2L drivetrain VIN: 1G1JC12492
thank you every one for your help you all said drums were out of round,and in my posting i forgot to add that i pulled the park brk while driving and did not have any back and forth pulsation so i took all your advice and replaced frt pads,rotors,rear drums,an...
2002 Chevrolet Monte Carlo LS 3.4L Torque converter clutch VIN: 2G1WW12E42
Thanks to all of you that replied. I neglected to metion there were no codes. I did the Battery disconnect and holding the terminals together but it did not help. The mass airflow readings were well within specification(fuel trims were +- 5% long term). I ...
2003 Chevrolet Silverado 2500 HD 6.6L No Start VIN: 1GCHK23113
Unfortunatly this vehicle is intermitent enough we are unable to completly duplicate the problem. The customer will drive it until it fails consistently.
2003 Chevrolet Silverado 1500 5.3L Air Bag VIN: 2GCEK19T33
Greetings fellow techs, Didn't get much response on this one but luckily one of the responses hit the nail right on the head. Steven [...] asked whether the off/on switch for the passenger side air bag was lit up in both the off and auto positions. Sure enoug...
1997 GMC Sonoma SL 4.3L Engine VIN: 1GTCT14W4V
Found that the flywheel was improperly machined. Thickness varied by 0.060". Installed a new flywheel and clutch kit - vibration is gone and engine runs smooth now. Thanks to all who replied, we appreciate the help and suggestions.
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