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Prev Professional Automotive Repair Technical Discussions for April 17, 2008
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Open Help Requests for GM
Help Request Answers
2001 Buick LeSabre Custom 3.8L Cuts out, Stall VIN: 1G4HP54K41
Cuts out at highwway speed hot only... Hello all. This is the most indignant car i've worked in in many years. Symptoms are as follows; At 55-75 MPH with absolutely no warning the engine quits as though the key was turned off. Not been able to establish a patt...
2003 Buick Park Avenue 3.8L vses VIN: 1G4CW54K53
no codes at this time but when you drive the car under nomal driving it will alternate applying either the right or left front brake.
1989 Cadillac Fleetwood 4.5L Starting VIN: 1G6CB515OK
Hi techs: we have this 89 fleetwood that was towed in with a no start complaint. we checked for fuel and spark and have fuel but no spark. checked for 12 volts to dist. and was ok next we checked ign. coil, cap, rotor and ign. module all checked ok. checked gr...
1996 Cadillac Seville STS 4.6L air vents VIN: 1G6KY5291T
we have a 1996 cadillac seville sts with duel comfort. the air from the driver side is warm while the passenger side is cold .we have run the test with tech 2 . have no codes .with the tech 2 we can command both both sides and are working. door position counts...
1996 Cadillac DeVille 4.6L Suspension VIN: 1G6KD52Y2T
This car has the Service Ride Control on the IPC display. The relay trick works great 95 down, but I know there is a way to bypass the newer caddys. Does anybody have a solution or know a solution to fool the computer, or reprogram the IPC? Thanks, GUY
1998 Cadillac DeVille limo 4.6L rear wheel bearings VIN: 1GEEH90YXU
Sorry if I posted this in the wrong area, but I,m a rookie here. I am working on this hearse with both rear wheel bearings shot. The only source I've found is the dealer. The bearings are serviced as part of the rear knuckle at $1261.31 each! Does anyone know ...
1993 Chevrolet Lumina 3.1L No Start, MIL Lamp on VIN: 2G1WL54T2P
vehicle came in with a no start. we checked the basics, we have fuel and compression, but no spark. we checked the codes and found 46,35,43,53,16,25,23,21,22,87,86 in the system. after checking all the sensors we checked the grounds. we then replaced the com...
1997 Chevrolet Blazer 4.3L pcv valve VIN: 1GNDT13W0V
hello all out there in iatn world. thanks in advance. i wouldn't have posted this except i now know of two of these vehicles with the same problem. i replaced intake manifold gaskets on both of them and now they have the same noise. the noise is definately com...
2000 Chevrolet C2500 5.7L Hesitation, Cuts out, Stall VIN: 1GCGC23R6Y
My personal truck that is throwing me for a loop. Upon first start up and each re-start(stopping for gas, groceries, pick up kids etc.), the truck will fall on its face with any amount of pedal and worse the closer you get to wot. Here is the kicker, once you ...
2000 Chevrolet Tahoe 5.3L hvac temp door motor VIN: 1GNEC13T3Y
I have tested with good results all circuts except I don't know if the control circut should pulse to change the temp. The voltage at the control wire at the actuator when connected pulses in 2 second intervals or so to drive the actuator warm or cold. I exper...
2000 Chevrolet Astro 4.3L Excessive Emissions, Misfire VIN: 1GNDM19W9Y
With intake gaskets replaced and no ignition problems , only at idle the misfire occurs. higher speed ok Is there any one out there that had this problem or these engine have some kind of internal problem. need help thanks Trouble codes: P0303
2003 Chevrolet Silverado 3500 6.6L No Start, Cuts out, dies VIN: 1GBJK33153
This one is bizarre. First, I will say that most of last year we were using B99, and switched this winter to B50. These Duramaxs seem to be more prone to filter clogging than our other diesels, and consequently, get more filter changes than the other diesels i...
2004 Chevrolet Silverado 1500 5.3L Engine VIN: 1GCEK19T54
Truck came into my shop with a complaint of a noise in engine. It is very hard to hear due to VERY load exhaust. I tried to determine which cylinder it was making the noise. I could not narrow it down. It does sound to me like a lifter that has given out or a ...
1994 GMC Sonoma SLE 4.3L No Start, Surge, Cuts out VIN: 1GTDT19W8R
Hello all. I have a 1994 GMC sonoma with a 4.3L V-6 with vin W. When it is running and idling it occasionally idles up and then comes way down or else dies. I drove it today for about an hour and then shut it off for a couple minutes and it would not start aga...
2002 GMC Sonoma SL 4.3L No Start, Stall VIN: 1GTCS19W92
We've also checked the fuel pressure after installing the pump, checked to specs. This time we are taking the bed off instead of the tank down as to not disturb the wiring just in case all this time it's got a broken wire and it just happens to make contact af...
1999 Oldsmobile Bravada 4.3L AC compressor VIN: 1GHDT13WXX
AC compressor is not being commanded to come on. The Compressor clutch relay has power at the #2 and #3 pins as it is supposed to. The ground command from the VCM isn't happening at pin #1 The master tech works very much like a Tech II and tells me an AC comma...
2002 Oldsmobile Alero GL 3.4L security light VIN: 1G3NL52E42
Security light intermittent no start condition. Vehicle has been doing this for approximately last two months. goes through the ten minute time out and will start and everything is fine. Is a tech 2 required for diagnostics on this?
1997 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NE52T8V
Engine runs very rough, obvious misfire, P0300 set, misfire counters on scan tool confirm misfires on cyl 1 and 3. Not waste-spark companion cylinders. Check for spark - no spark on cyl 1 and 3. Replaced Ign. coil housing, springs and plug boots - no change. R... Trouble codes: P0300 (Misfire)
2000 Pontiac Bonneville SSEi 3.8L Stall VIN: 1G2HZ5412Y
Hey everybody this Bonneville is Supercharged. Only when hot the car will stall intermittently, coming off the highway, stop and go traffic, on exit ramps and city driving. The car always restarts immediately. We just cleaned the throttle body and mass air flo...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac Seville SLS 4.6L ride control VIN: 1GGKY529XT
1993 Chevrolet C1500 Cheyenne 5.7L rotors VIN: 1GCDC14K4P
Overwhelmingly the replies are to replace the front brake hoses. Which has been done already, I have received some very useful information on how to test the brake system using a Temperature sensing gun. At this time I am going to close out this request and re...
1995 Chevrolet Blazer 4.3L No Start, Surge, Stall VIN: 1GNDT13W3S
Thanks to all for the excellent advice.This one has been gone for ten days and customer says it's doing fine. I never would have believed that cleaning the egr would have solved this problem! Til next time...
1995 Chevrolet C2500 Cheyenne 6.5L Hesitation, Cuts out, Stall VIN: 1GCGC29F8S
Thanks for all your help! I did check the complete fuel line for any pin holes, in case air might be pulled into the fuel system as suggested. I also installed clear tubing at the injection pump, but did not see any air bubbles. At this point the customer has ...
1998 Chevrolet K1500 Cheyenne 5.7L Blower motor VIN: 2GCEK19R5W
Thanks for all the good advice! The water was coming into the blower air box via a screw hole above the blower motor. I had to take off the cowel cover to see it. The plate was sealed up good as some of you suggested. I sealed the screw hole and tightened d...
2002 Chevrolet Impala 3.4L a/c comp VIN: 2G1WF52E22
thanx guys, the fix was disconnecting the aftermarket start system from the bcm and powering down the internal memory capacitors to reset everything to standard start up values. customers need to know that unless factory or dealer installed accy's are installe...
2003 Chevrolet Impala 3.4L bpmv
Thanks to all who replied. I was able to find a used unit. Install was fairly easy. Saved Customer $ along with banking a few bucks. Thanks Again
2005 Chevrolet Uplander LS 3.5L belt lock VIN: 1GNDV23LX5
Thanks Paul and Charles. I did check the seatbelt and all the doors and did not see any thing wrong. Both worked right I thought; but I when back to that P/S power door and that back corner would jump out just a little. The next time I made sure to push it in ...
1995 GMC Yukon 5.7L No Start VIN: 3GEKE189KS
well guys this is gonna make me look real stupid but there was just enough gas to show good fuel press. but not enough to run and the gas gage was stuck on 1/2 tank wich was not mentioned when car was droped off put gas in it and it worked sorry for looking so...
1999 GMC K2500 Sierra SLE 7.4L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GTGK23J6X
Thanks to all who replied - particularly Chester from N.C. - just the info I was looking for - unplugged all consumers one at a time - culprit was B1S1 - heater ckt wires chaffed on heat shield causing dead short on ckt 539 - MIL out - no more recurring codes ... Trouble codes: P0102.
1999 GMC Safari SL 4.3L No Start, Poor Idle Quality VIN: 1GTDM19W2X
OK, weird one here. Fuel was leaking out of the top of the injector body of this one; fix was simple enough. As far as my concern over the wiring harness goes, it wasn't a big deal. The only part of the harness I had to replace was the PCM connectors since the...
2002 Pontiac Grand Am SE1 2.2L SES, ABS, Security, & Low Trac Light VIN: 1G2NF52F42
Thanks for the replies, but the customer has not brought the car back in because the lights are not detrimental to performance or economy & they always go off when the key is turned off & back on. Sorry for no good news but if it comes back in I will then post...
1998 Saturn SL1 1.9L loosing oil VIN: 1G8ZH5280W
Not sure how this one got posted. Anyways, from all the replies this is a common problem on the 1.9l Saturn 1996-1998 models. The Customer declined to have the engine work done at this time, they will think on it. However, here are some of the fantastic repli...
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