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Prev Professional Automotive Repair Technical Discussions for March 17, 2010
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Open Help Requests for GM
Help Request Answers
2001 Buick LeSabre Limited 3.8L HVAC Display Milage display VIN: 1G4HPS4KS1
This Buick lasaber limited. The HVAC disply is not working the only thing showiong on it lower bottom right fc and none of the buttons are lite. the compressor is running and the fan is running on medeum also the mileage is blank also. once with the key on and...
1993 Chevrolet Corvette 5.7L interior lighting VIN: 1G1YY33PXP
Car came in with the inerior light staying on if you remove the interior light relay the lights turn off. I checked scan data and it shows that both front doors are closed and that the interior lights are comanded on by the computer. So the computer is seding ...
1995 Chevrolet K1500 Silverado 5.7L transfer case VIN: 1GTEK14KXS
I have this pickup in the shop. The customer originaly said that when in 4 wheel drive the front wheeels would drag when backing up. When test driving the vehicle I noticed the truck felt like the brakes were intermitantly dragging. Even though the brakes were...
1997 Chevrolet K2500 7.4L Poor Idle Quality, Surge VIN: 1GCGK29J1V
This truck will surge under wot most of the time,idles rough but owner says its been that way from new.Gas mileage has dropped quite a bit.Owner said about 3000 miles after he replaced exhaust after cat with dual set up problem started. O2 's appear to be work...
2002 Chevrolet Prizm 1.8L No Start VIN: 1Y1SK52812
Thanks for looking . Replaced rings for oil fouling #4 . Vehicle ran when brought in , now will not start . Coils # 1 & 3 will fire , #'s 2 & 4 will not . Have read that the PCM will fail safe and disable injectors if coil failure is detected . I get one flash...
2005 Chevrolet Avalanche 1500 Z71 5.3L traction control VIN: 3GNEK12T25
Thanks to all who take the time to read this.This truck will engage the traction control at low speeds on acceleration when there is no slip occurring.There are no codes and all data looks good to me.With traction control disabled the problem doesn't occur.At ...
2006 Chevrolet HHR LS 2.2L Poor Idle Quality, Hesitation, Misfire VIN: 3GNDA13D06
This is used car at our dealership. I was brought to us with a MIL and runs rough complaint. There are no fault codes except for a random misfire. It feel like the EGR is stuck open but it isn't equipped with an EGR. Misfire data at idle shows a constant misfi... Trouble codes: P0300
2007 Chevrolet Silverado 1500 WT 4.3L srs VIN: 1GCEC14X37
could not run set up in sdm module do to code b0012 oe resistance below spec stage 1. could not clear code but could disconnect air bag module and could clear b0012 oe resistance low/ shorted circuit but then sets codes for resistance high / open circuit. inst...
1997 Pontiac Grand Am SE 3.1L Gear Selector VIN: 1G2NE52M9V
The 20 Amp fuse labeled ERLS in the underhood fuse box next to the battery keeps blowing. When this happens the brake light and the abs light on the dash will come on. Also the gear selector will be locked and will not activate the solenoid to release the tran...
2001 Pontiac Aztek 3.4L High Speed Cooling Fan VIN: 3G7DA03E91
This car came in from another shop that could not figure out what was wrong with it so they wired a switch in to activate the fan. I removed the modification and hooked up my scan tool (OTC Genisys system 3.0), no trouble codes, and low speed fan works when ac...
2004 Pontiac Grand Prix GTP 3.8L Poor Idle Quality, Misfire VIN: 2G2WR52404
Misfire on #4 and #3 cylinders at idle, cuts in and out under load. Have replaced plug wires, plugs, smoked the vacuum system, replaced coil packs and module, had the injectors checked and cleaned, checked compression, and fuel pressure-all within specs. #4 mi...
2001 Saturn SL2 1.9L Surge, Cuts out, Stall, Misfire VIN: 1G82K52771
Hi everybody I have a saturn that is giving me trouble.It came in complaining of bucking and stalling and wanted a tune up.I felt it drop a cylinder and the check engine light was on.The 300 code was a plug wire letting spark go to ground 65k ohms put plugs an... Trouble codes: P0300 (random missfire), P0401 (EGR flow), P0410 (secondary air management), P1599 (stall detected)

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Camaro Z28 5.7L Hesitation, Misfire VIN: 2G1FP22PXR
this problem turn out being a pcm. That was my first guess anyways Trouble codes: 43 (esc problem).
2004 Chevrolet Blazer LS 4.3L high idle VIN: 1GNDT13X44
well thanks to all that replied. was unable to check iac counts and or control iac with modis. sent car off to the dealership apparently there scanner can do that.so hopfully they can recalibrate the iac with gm scanner. Trouble codes: P0507.
2007 Chevrolet Silverado 2500 HD LT 6.0L R/f speed sensor VIN: 1GCHK23K17
Gentleman, thanks to all for the input! Both robert from Mass & Robert from Montana were very helpful. The air gap on the newly installed speed sensor was not great enough, causing signal to drop out below 7 mph. We installed 4 shims and then the signal no l...
1994 Oldsmobile Cutlass Ciera S 2.2L No Start VIN: 1G3AG5548R
I want to thank everyone who responded! This was a :no start" problem. After reading the data base a second time, it gave me some new ideas that helpped me pinpoint the problem. I called two drivability teachers who gave me some real good tests but I did no...
1997 Pontiac Grand Prix GT 3.8L fuel guage VIN: 5TR58IU876
I put a new sending unit in it and fixed the problem
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