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Prev Professional Automotive Repair Technical Discussions for May 13, 2004
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Open Help Requests for GM
Help Request Answers
1998 Buick Century Limited 3.1L Safety VIN: 2G4WY52M0W
I have this problem on this Buick, the same problem on a 2001 Pont Montana Van also. The wipers are parked at the 12 O'clock position. I did the Alldata test, for wiper parking, on both vehicles to no good results. I installed a Reman wiper motor,with new circ...
1998 Buick Regal 25th Anniversary Edition 3.8L Cuts out, Stall, VIN: 2G4WF5210W
Engine runs fine until you turn the turn signal(s) on. When that is done we loose all electrical and engine stops. Intrerior lights, dash, and exterior lights go out. After about five minutes the lights will come back on but nothing else will happen. After abo...
1990 Cadillac DeVille 4.5L No Power VIN: 1G6CD5334L
When you accel the car falls on it's face, no power. If you keep your foot in it, it will eventually pick up speed and keep on going. Looking at the scanner i noticed the timing drop from 29 degrees to 8 degrees then increase back up to 40. I also noticed map ... Trouble codes: 41 (Camshaft sensor signal not present at ECU)
1995 Cadillac DeVille 4.9L sluggish no pep VIN: 1G6KD52B1S
Need help on this Cadillac Deville with hard to solve problem; Grounds seem to be a pattern failure on this cars, and no fix results from the - symptom - fix - according to its problem-fix relationship Vehicle's motor symptoms same as a plugged up catalytic ... Trouble codes: N/A (No Trouble Codes)
1993 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality, Stall, Misfire VIN: 2GCFK29K5P
hello! i am new to this site thought id give it a shot on this problem chid. the truck runs bad cold. misses act like it is loading up.when you snap the throttle on decel some times it dies but mostly it act like it is running on about 4 cylinders. it does idl...
1994 Chevrolet C1500 Suburban Silverado 5.7L Stall VIN: 1GNEC16K3R
HI and thanks in advance for any help. When this truck is first started it will run for about 10 secondsand stall. It will restart with out any problem and about 10 seconds it will stall it does this about three times and it will run great good power and it wi...
1996 Chevrolet Astro 4.3L No Start VIN: 1GBDM19W2T
i inherited this van from a friend/contractor who tried multiple things to repair poor running to no start eventually.many things were wrong but now i need some fresh ideas.the distributor was checked for rotor position and reset.new ac delco dist. cap,rotor,p...
1997 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13R1V
I would like to know if any other tech,s or shops have run into fuel in main injector harness where it plugs into central fuel injector body, then travels into wiring insulation to ECM. also poppet nozzles are sticking. Thanks, Dean Trouble codes: P1406, P300B
1998 Chevrolet Tahoe LS 5.7L overdrive VIN: 1GNEK13R2W
When driving in overdrive at speeds of 40 mph and above transmision seems to buck, if I drive with it in 3rd Gear condition does not occur. Originally when this happened it also had a load noise from the rear end and it would jerk and make noise. Tore down rea...
2000 Chevrolet Silverado 1500 5.3L front seal VIN: 1GCEK19T9Y
Hep me, Hep me, Hep me, Good customer had full ticket done last month, we had trouble installing the front output shaft seal on the transfer case it is an nv246 two speed auto transfer case. It fits very tight on shaft and actually spins with the shaft instead...
2000 Chevrolet Monte Carlo LS 3.4L No Start, Stall VIN: 2G1WW12E9Y
hello everyone. this one has got me going in circle so i need some of you to redirect me. car came in with intermittent stall right after start up from ford dealership. checked for codes in pcm and found p1626 stored in history. checked for codes in bcm, radio... Trouble codes: P1626, U1016
2001 Chevrolet Tahoe 5.3L abs motor VIN: 1GNEC13T61
Vehicle came in with a disconected ABS maxi fuse because the pump seemed to keep running. We confirmed and have an ABS light on. The Snap-on MODIS will not pull an ABS code, but did get a U1041 (loss of EBCM) from PCM. Following this path leads to bad EBCM. An...
1996 Oldsmobile Aurora 4.0L Hesitation, MIL Lamp on VIN: 1G3GR62C9T
Engine will hesistate badly on cold accel to the point it almost stalls-ses lamp comes on with code p0101-replaced maf sensor,map sensor,pcv valve-no change.when reviewing the failure records with tech 2 the maf sensor readings look normal-35-60gps at 20% tps-... Trouble codes: P0101 (maf sensor out of range)
1997 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HN52K5V
hello eveyone need some help here car came in with siezed motor replaced motor upper and lower intake manifolds. car ran fine no codes. after 1 week customer returned found code po401 inssuficant egr flow. Tested egr and map sensor seem to working properly any... Trouble codes: P0401
1998 Oldsmobile Aurora 4.0L headlights VIN: 1G3GR62C8W
Vehicle came in because when it was sitting in the garage at home the headlamps and park lamps would briefly come on. And by briefly I mean they would flash on and off. Test drove vehicle and was able to duplicate symptom. Lamp contol module was making a click...
1999 Oldsmobile Intrigue GL 3.5L Cuts out, Stall, cold/hot start VIN: 1G3WH5Z2H1
This vehicle came in a month ago or so with a code PO385 CKP sensor "B". The sensor was replaced and problem fixed. About a week ago the customer came back with a stalling complaint on a cold or hot soak restart. Re -scanned codes,none found. TB was extremely ...
1994 Pontiac Trans Sport 3.8L Poor Idle Quality VIN: 1GMDU06LOS
after van reaches operating temp motor will idle up to around 2500 rpm this happens when driving and when stopped in neutral the iac count will increase to 38. tps will stay normal.the only way to correct is to turn the ignition off and restart then the rpm wi...
1997 Pontiac Sunfire SE 2.2L Cooling Fan VIN: 1G2JB124XV
Hello there. I have this Sunfire that overheats at idle. The cooling fan does not come on untill the coolent is boiling out past the rad cap. After the fan come on it only takes a around 30 seconds to cool enough to stop boiling out. If the A/C is on the fan o...
1997 Pontiac Trans Sport 3.4L Surge, Stall VIN: 1GMDX06E2V
need help. vehicle came from another garage, garage told customer that it possibly needs a pcm or reflash. vehicle surges real bad at take off from light. fuel pressure doesnt drop but the fuel pump is growling a little louder than normal. tryed to check for p... Trouble codes: P0706
1998 Pontiac Bonneville SE 3.8L MIL Lamp on VIN: 1G2HX52KXW
does anybody have some more info on what triggers a code p1352b i have checked the ign system with no luck i even went as far a replaceing the ign coil and coil packs only to have the code come back any help would be great Trouble codes: P1352

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Regal 3.1L Radio
Thanks for all the replies!! A couple of you sent me the procedure for retrieving 2 codes to use to call the dealer and get the unlock code. You have to hold the '2' and '3' buttons for a few seconds and you will get a 3 digit code, press am/fm button and anot...
1968 Chevrolet corvette 350CID windshield wipers VIN: 194678S424
thank you to all who responded, as allmost all of you suggested there were ground problems, ground circ, near starter was connected to R post at sol, also, the vac circuits under dash were a mess, easiest to just replace most of it, also had problems with elec...
1987 Chevrolet Cavalier 2.0L Excessive Emissions, Poor Idle Quality, Surge, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1JC1112H
Thanks to all who replied! After almost everyone said to re check the power/ground circuits I ran thru every ecm circuit and found nothing different than my preliminary tests (never hurts to check twice tho) Upon further investigation I found that the owner ha...
1988 Chevrolet Cavalier Z24 2.8L Mechanical VIN: 1G1JF31W3J
customer didn'twantto pursue problem any further because of expense.when it left gauge did read a little higher from new oil pump,but still not great. thanks to all who replied.
1991 Chevrolet Caprice 5.0L cylinders VIN: 1B4GP45R8B
thanks to the 20 members that sent replays. its clear now that there no problem with these engines going 150k + with no problem, the gm guy must have been pulling her leg or going off of the mileage to age of the vehicle and expecting that to stay consistant. ...
1996 Chevrolet Caprice Classic 5.7L harsh engagement VIN: 1G1BL52P8T
Howdy, Well I made a mistake, when I tested the line pressure I didnt pay attention, I was testing another last week and the pressures seemed low so I looked them up and they were right, starting at [...] at 175. My caprice pressures started at 85 and peak...
1997 Chevrolet Lumina 3.1L tcc
I checked everyones suggestions and all looked ok. I'm sorry it took so long to get back to you but I finally got the customer back. After replacing the valve body, spacer plate, torque converter, forth clutch packs and resealing the trans with no fix, GM Tac ...
1998 Chevrolet Blazer 4.3L No Start, VIN: 1GNDT13W9W
I was un sucusfull in finding the problem. The blazer has been to two seperate dealers and thay can't fix it eather! I am convinced that it is a problem with the security system. however I have replaced every part in the security system other than the wireing,... Trouble codes: 11NE0, 11NE0.
1998 Chevrolet Monte Carlo LS 3.1L engine VIN: 2G1WW12M1W
You guys were right! The student dropped a Map sensor screw when he was dissambleing the engine. (he didn't tell anyone he dropped it and when he could not find it gave up looking for it) When he removed the lower intake you know where the screw went!!! Both...
1998 Chevrolet Express 2500 5.7L engine VIN: 1GAGG25R4W
Thank you everyone for the help. Special Thanks to Keith, Steve, Brian, David and Paul. I found out I caused this problem myself when I installed a new radiator.This Van is Bi-Fuel, Gas and Lpg and there is more than one choice on where to reinstall the crankc...
1999 Chevrolet K1500 Suburban 5.7L Fuel Pressure Regulator VIN: 3GNFK16R0X
5 of 12 said fuel lines hitting the firewall,we checked that already. Survey says 'Get new eyeballs!'. Paul, from Darling's Automall hit it head on. 'Odds are, when then intake was removed, the fuel lines were unhooked and bent upward to give you some more r...
2002 Chevrolet Silverado 2500 HD 8.1L Stall VIN: 1GCHK23G22
Here's what we did. We replaced the crank sensor. The part was updated and looks a little different. I don't know why it wouldn't set a crank sensor code when it failed. It did set a code when unplugged though. We monitered all three wires on the sensor with o...
1996 Pontiac Bonneville SSE 3.8L engine VIN: 1G2HZ5218T
Thank You all for your imput. Yes there are major differences in these engines. A straight swap without major modifications would probably be short lived. The cost to make these modifications outweigh the savings in purchasing the non-supercharged engine. I gu...
1996 Pontiac Grand Am SE 2.4L passlock VIN: 1G2NE12T1T
Customer picked up vehicle and will 'live with it awhile'. Only stalls on initial start up after sitting awhile. Found out dealer had replaced computer awhile back with no positive results. Our repair of ignition switch and new key took care of major no start ...
1999 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR5211X
Thanks to all who offered advise. As Budd and Russell both suggested the problem was with the instrument cluster connector not being fully seated. I was able to sit in car with it running and I started appling pressure to the lower right hand corner of cluster... Trouble codes: P0650 (MIL control circuit), P1637 (Generator L circuit), P1653 (Low oil level circuit), P1673 (Engine hot light circuit).
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