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Prev Professional Automotive Repair Technical Discussions for September 25, 2008
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L No Start, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G4HP52L88
car intermittant stalls surges set codes p0341 and p1361 have replaced cam and crank sensors ign module no help Trouble codes: P0341, P1361
1995 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52L7S
This one is strange to me, it's a friend's car and trying to fix it in the driveway, which is always fun. The car is a crank/no start. Started out as a lack of power on the highway, then turned into a stall problem, now is a crank/no start. The codes are all h... Trouble codes: P1670, P0321, P0705, P1361
2001 Buick Regal LS 3.8L security VIN: 2G4WB52K61
no start condition at times if no start set,s security lamp and code in bcm b2960. ignition switch and lock cylinder and key have both been replaced.
2001 Cadillac Catera 3.0L No Start, Stall, Misfire
This car has misfire on all 6 cylinders. Will do this cold, and if you play with the throttle and get it a little warm, it will run on its own. However, under a load it will still misfire. Have tried new coil packs for both engine banks. Scanner indicates the ... Trouble codes: P0300
2002 Cadillac Escalade 6.0L Unknown VIN: 1GRT65FVH2
Allright Cadillac masters... This escalade is acting strange.. When driving over 50mph and hitting a bump, the steering wheel begins violently shaking back and forth.. The only way to make it stop is too pull over and start again... Raised the vehicle, everyth...
1972 Chevrolet C-60 366CID Misfire VIN: IG34589966
Hi Guys and Girls. Does anyone have the firing order on this vehicle. I just done the heads. I have several programs and books and cant find anything this far back. I have a misfire very bad on # 8 and everything seems ok. Your replies will be appreciated.
1994 Chevrolet Astro CL 4.3L power steering VIN: 1GNEL19W6R
Thanks to all of those who reply to help request. We have been working on this van for a while trying to find the problem with the power steering system, it has hyrdraulic power assit brakes also. it started with replacing a power steering pump for a bad leak,...
1998 Chevrolet Astro 4.3L Monitors VIN: 1GNDM19W7W
Got a wierd one, wondering if someone has ever seen this. Catalyst, EVAP, and EGR monitors will not set. Customer tried emission testing around a month ago, rejected as "unready". Have found absolutely no issues with datastream, or any driveability issues. No ...
1999 Chevrolet Venture 3.4L Cuts out, Stall VIN: 1GNDX03E3X
Fellows I need HELP. 00 chevy venture 3.4 Every time you start off on the road and give it more than 50% tp. It will start to stall out bad and as long as you dont let up none on the gas it will do it for ever. You can go WOT and it will continue.If you let o...
2004 Chevrolet Tahoe LS 5.3L Brake booster VIN: 1GNEC13TX4
I have a control message on the instrument cluster that says service brake booster. This truck has a hydroboost system. Everything seems to be working fine. Anyone had this before. What am i missing to check? What else would cause this to come on. I have codes...
2004 Chevrolet Suburban 1500 LS 5.3L tire pressure monitor VIN: 3GNFK16Z24
2002 GMC Envoy SLE 4.2L guages inop VIN: 1GKDT13S22
Here's a good one for you GM techs . on every module I can get loss of communication codes. Basically it has to sit over night first thing in the morning at about 50 degrees the IPC will only have a speedo and a tach the other guages are inop and idiot lights ... Trouble codes: U1041, U1026, U1041, U1152, U1162
2001 Pontiac Grand Am SE 3.4L door locks VIN: 1G2NF52EX1
hey guys i got a grand am with a mind of its own.when you put the car in gear and start moving the door locks start cycling to lock and unlock and doesnt stop until you put it back into park,i disconnected the door lock switch on both sides but it didnt stop.i...
2002 Pontiac Grand Prix GT 3.8L Stall VIN: 1G2WP52K42
Car came in for an intermitent stall condition. Customer states when slowing down to stop or make a turn the car will stall as if you shut off the ignition. He puts it in nuetral and it start right away and runs fine. I have not been able to duplicate this sym...

Fixes & Summaries for GM
Fix/Summary Answers
1992 Buick Regal 3.8L overdrive VIN: 2GAWF14L1N
Well thanks to everyone for taking the time to give some ideas. The front clutch was bad. Didn't want to sell it with a partial fix so had it rebuilt. Most of you guys had the right answer. Thanks again for all of your time. IATN is a fantastic place to get id...
2004 Buick Rainier CXL 4.2L engine VIN: 5GADT13S84
well, unfortunately this one will remain a mystery. when disassebling the engine, a few tty bolts were broken in the block. i removed three of them, but was unable to extract two so we sent the block to a machine shop. they were unable to remove them either. t...
2001 Cadillac DeVille 4.6L mode door VIN: 1G6KD54YX1
Thanks to the 11 members that took the time to reply. Sorry for the long time to close the post but I just got the car back in the shop for the repair. The fix was the mode actuator that controls the positions to the defrost / the lower and the vents. I was ab...
1995 Chevrolet Camaro Z28 5.7L lf abs motor VIN: 2G1FP32P3S
Sorry it took so long to get back. Hurricanes!!!. Any way after rebuilding the 6 wire harness to the ebcm and retesting connections, still shows as a bad ebcm. Replaced ebcm and so far so good. Sometimes the bogus parts gods frown upon us. Thanks for all the g...
2000 Chevrolet Prizm 1.8L MIL Lamp on VIN: 1Y1SK5285Y
using some of the test techniques that were sent to me i was able to diagnose & replace the cannister assy. thanks to all. Ron Trouble codes: P0440, P0441, P0446.
2001 Chevrolet Silverado 1500 HD LS 6.0L battery VIN: 1GCGC13U81
Thanks for all the replies. The culprit was the a/c relay. The relay caused the a/c clutch to stay engaged all the time. This is the best tool I have in my tool box.
2004 Chevrolet Silverado 1500 4.8L Vibration VIN: 1GCEC14V84
The verdict is in on this one-with the deisel tank empty the vibe is gone.My theory holds with those who suggested the change in the driveline angle was the culprit but it is running P metric tires...Unfortunatly we may never know because said fuel tank is goi...
2004 Chevrolet Classic 2.2L No Start, THEFT LIGHT VIN: 1G1ND52F64
Wow, what a great response! I received 18 replies. What a terrific network we have here. Most of the suggestions zeroed in on the ignition lock cylinder, and they are probably correct. After relearning the Theft Deterrent System, I was never able to get th... Trouble codes: B2960 (pass lock cylinder data incorrect).
1997 GMC Sonoma SLE 4.3L Driveline VIN: 1GTCS19W7V
Most said it, it was in the driveshaft. I was pretty sure too when I posted this, by process of elimination, but I wanted some people to confirm that. Thank you for doing so! The rear double carden was out of it. Fixed and good.
2002 GMC Yukon SLE 5.3L MIL Lamp on VIN: 1GKEC13Z82
Responses didn't seem to grasp the fact that resetting all modules had no effect and no other modules had any codes according to the Solus Pro, but of course it doesn't see all. My next step would have been to isolate the wire from the PCM in order to confirm ... Trouble codes: P0650.
1996 Oldsmobile Cutlass Ciera 3.1L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 1G3AJ55M5T
Huge Thank-You To All The Outstanding Techs That Took The Time To Reply To My Plea For Help.Most All The Replys Were Vacuum Leak.Well We Finaly Borrowed A Smoke Machine And Low And Behold We Had A Intake Vacuum Leak.Was Unable To Find This Leak With Carb Clean... Trouble codes: P0171, P0131.
1992 Pontiac Grand Am SE 2.3L compressor won't cycle VIN: 1G2NE54D9N
Thanks to all who replied, We where in a hurry and wasnt paying attetion to the basics, we repaired the intermitant cooling fan connection at the fan motor and after repairing the connection still was having issues of higher then normal high side pressures. T...
2000 Pontiac Grand Am GT 3.4L No Start VIN: 1G2NV52E5Y
Thank you for all the replies on this car as many of you suggested and as I suspected the problem was a failed ignition switch.
2000 Pontiac Montana 3.4L PS Pump VIN: 1GMDX03E9Y
I was WAY off on this one. This vehicle doesn't have any type of speed sensitive steering, and it just didn't make any sense that the power steering could behave the way it did. I had to drive it almost 15 miles for the noise to start. I took it for another ex...
2003 Pontiac Grand Am SE 3.4L No Start VIN: 1G2NF52E03
thank you for taking the time to replay ,most all of the replies i got leaned towards the ignition switch. all very good replies, i tried a new one, and checked the wiring. the switch didnt help, i know it is some sort of simple thing i am overlooking. i am cl...
2006 Pontiac Grand Prix 3.8L Cuts out VIN: 2G2WP55246
First of all let me say thank you to those who responded. Robert sugested that I might have a missfire due to carbon tracking, Leonid sugested that I may have a crankshaft sensor problem as this is verry common, and Tom suggusted to check the throttle plate ...
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