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Prev Professional Automotive Repair Technical Discussions for January 28, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Limited 3.8L Poor Idle Quality, Stall VIN: 1G4HR54K7Y
car came in with stalling problem when tank was full. found vent solenoid to be stuck closed and charcoal canister full of fuel. both long and short term fuel trims were at -20 during purge. replaced parts and road tested car ran fine. two weeks later car back... Trouble codes: P0440
1999 Cadillac Seville STS 4.6L fuel gauge temp gauge, loss of comm., radio ino VIN: 1G6KY5494X
I have a seville that is at our saturn dealer. Unknown history as this car came from the auction. If the key is turned to the on position, everything is fine. when the vechicle is started the temp and fuel gauge quit,but the tach and speedo work fine. the abs,...
1996 Chevrolet C3500 6.5L No Start, Stall VIN: 1GCHC39F5T
After repeated attempts at diagnosis and replacing the injector pump and cranckshaft position sensor, this truck still has a problem with occasional stalling. Sometimes it will stall at idle, and at other times at cruise, just driving down the road. The proble...
1997 Chevrolet C1500 Silverado 5.7L No Start, DRAGS STARTER VIN: 1GCEC14R2V
hey guys heres one to think about.this truck comes in with a intermitten problem of no start,dragging starter like timing was over advanced.didnt see complaint at that time.however we all know that chevys had a problem with crank sensor causing with th...
2000 Chevrolet Suburban 1500 LT 5.3L 2-3 shift VIN: 3GNFK16T3Y
hello fellow techs.thanx in advance for any help please.this truck started to hesitate sligtly between all gears and flare real bad between 2-3 gears[second trans from builder].no codes.all trans data normal.all eng. data normal as well.called trans builder he...
2000 Chevrolet Venture LS 3.4L MIL Lamp on VIN: 1GNDX03E4Y
hello techs i've been a gm tech for while now, never seen this one.i replaced headgaskets and heads [the norm]it ran fine cel came on for a o2 sensor,it was using antifreeze replaced sensor.ran great costomer took it home,but ever since the service engine soon...
2001 Chevrolet Silverado 1500 5.3L fuel pressure VIN: 2GCEK19T31
this truck was brought to me because it would not start when it got here it would not start had no fuel pressure i applied battery power to fuel pump and it started right up after that if i let the truck sit for about 10 min it cranks a couple of times i let g...
2001 Chevrolet Silverado 1500 LS 5.3L Misfire, MIL Lamp on VIN: 2GCEK19T31
Hey guys, I had this 2001 chevy p.u. come in to my shop two days ago with an engine misfire problem. #7 cylinder misses at all engine speeds and temps. It has good fire and compression, the injector does not fire and will not light a noid light. However there ... Trouble codes: P0200 (injector circuit malfunction), P0300 (misfire detected)
2002 Chevrolet Avalanche 1500 5.3L all dash lights VIN: 3GNEK13T02
We have this Avalanche which will burn the dimmer out of the headlight switch in about five minutes. We have replaced the switch three times, and put a used instrument cluster in it and it still does this. It belongs to our service writer and he is at his wits...
2002 Chevrolet Tracker 2.0L Ignition coils VIN: 1G1ND52M1W
First of all thanks for any help and input you have, Second the vin supplied is for my own vehicle not the vehicle in question, Now what I have is a towed in tracker first time customer. Customer was driving down the road vehicle quit and will not restart, I h...
2002 Chevrolet C7500 8.1L No Start, Hesitation, Stall
i have already emailed mitchells for as much info as they could provide. is there a way to tell if it a factory system. any source for info would be appreciated. we believe it to be fuel related.thanks in advance for your time and help
2004 Chevrolet Trailblazer LS 4.2L Battery Light VIN: 1GNDT135X4
Hello everybody. We have this trailblazer with a battery light "dimly illuminated". We only noticed this after flushing the transmission. The customer is a trusted customer and said it was not on before. We checked for miliamp draw (15 miliamps), charging at 1...
2005 Chevrolet Silverado 2500 HD 6.0L No Start VIN: 1GCHK23225
Have this 05 chevy come in on the hook with a no-start. We scanned it to check codes, could not read data. Found bad cig light fuse, replaced it and could read data. Would not start - cranked well. Data showed very low fuel pressure. Primed fuel system with fi...
2006 Chevrolet Express 3500 6.0L engine VIN: 1GCHG35U56
hello thanks in advance.. we have a 6.0l engine here with a squeaking noise that gets louder as the engine gets warmer. has good oil pressure, when the engine is cold at first start it has a slight chirp like from a belt but after several min. the chirp gets q...
2006 Chevrolet HHR LT 2.2L Unknown VIN: 3GNDA23DX6
This vehicle makes noise in the front passenger side when accelerating and only when turning left. It Even makes noise when taking off at a redlight turning left. We rotated the tires, check the suspension to make sure it was tight, and it didn't help. We put ...
2007 GMC Yukon XL 2500 SLT 6.0L Starting VIN: 1GKG26K97R
truck was brought in for intermitant no crank problem. he said it only happens about once a month. so i thought i wouldn't be able to duplicate problem. but i did, after i had my diagrams printed and power probe out it started. i did have time to see if the re...
1996 Oldsmobile Cutlass Ciera 3.1L No Start VIN: 1G3A153M0T
Greetings all. Unit towed in twice for no start.Both times started immediately when tested. customer left car here for us to check on. when checked next day unit would crank but not start. Noted the check engine light did not prove out. Scanned unit and found ...
2001 Pontiac Grand Am GT 3.4L coolant fans VIN: 1G2NW12E41
This 01 Grand AM came into my shop from another repair shop. The coolant fans will not shut off. The other shop replaced the relays,thermostat, mode module,tested all the grounds and instrument cluster. Both coolant fans run at low speed all the time, the only...
2003 Pontiac Grand Prix GT 3.8L runaway idle VIN: 1G2WP52K73
have a fun one here this pontiac is eatin my lunch.runs beautiful on start up as you let it sit there running the rpm gradually rises .it has gone as far as 3000 rpm.have thrown a few parts at it and niether have helped .checked powers grounds!and everything i...
1998 Saturn SC2 1.9L readdiness monitors VIN: 1GBXC5273W
Relaced t-stat due to low coolant temps. Replaced radiator dut to a leak. Cleared codes test drove to reset monitors and checck for any new codes or repete of the previous codes. After lots of driving, monitors have yet to reset Car came in with the same monit... Trouble codes: P0341, P1599, P1620
2000 Saturn SW2 1.9L Excessive Emissions, MIL Lamp on VIN: 1G8ZN827XY
Service Engine Soon light is on. Code P0172: System Rich Bank 1. Emissions passed on smog test with CO readings of .01% at 15mph, and .00% at 25mph. B1S1 and B1S2 O2 sensors are pegged full rich. STFT is at -50% and LTFT is at -30%. Fuel pressure is 41psi. ECT...
2003 Saturn LW300 3.0L Misfire VIN: 1G8JW84R13
Saturn Techs I need help. 03 LW300 3.ol v6 Live data shows #4 misfires at idle, not as much under load but the misfire is there. Vehicle has good compression, new plugs, new injector, new coils with boots. Harness checks good, no vacuum leaks, only code is #4 ...

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Regal LS 3.8L Power Steering Rack VIN: 2G4WB52K73
Ok, after losing my hair on this one I've finally got it fixed. I rigged in a pressure guage setup to monitor the pump pressure while driving with the 2nd rack in the car. After driving it home and back (30 miles), the only thing I noticed was the pressure wa...
2000 Chevrolet Blazer LS 4.3L hvac VIN: KJKIUI8976
so we were all wrong all it was was a bad rad cap!!! put a new one on and she runs like new
2003 Chevrolet Silverado 2500 HD 6.6L key fob, front seat heater VIN: 1GCHK29113
Thanks for the replies.---We ended up sending this thing back to the dealer (we are not set up to reprogram systems yet).The fix was a combonation of things. It did need the programming update but the seat module was also shot (reverse polarity coming from the...
2007 GMC Sierra 2500 HD Classic SL 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GTHC24V37
Cylinder 3 exhaust valve spring found broken. After verifying cyl 1 integrity (see help request) because it being the most severe cylinder misfire, I decided to check the next most severe which was number 3. pulled plug and found it wet and dark, compressio... Trouble codes: 300 (Random Misfire), 101 (Maf circuit).
1995 Oldsmobile Aurora 4.0L brake lights VIN: 1G3GR62CXS
I replaced the turn signal switch ($555.oo retail!) and I have brake lights! Thank you all. Thank you.
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