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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 26, 2007
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Open Help Requests for GM
Help Request Answers
2002 Buick Rendezvous CX 3.4L Poor Idle Quality VIN: 3G5DA03EX2
we have a 02 rendezvous the fan relays will start clicking and shortly there after the idle will surge up then the relays will stop clicking and the idle will return to normal unplug one of the cooling fan relays idle returns to normal. checked ground circut f...
2003 Buick LeSabre Limited 3.8L Tilt VIN: 1G4HR54K63
This is your preverbial 'little old lady' car. She called me and said she couldn't tilt her wheel. I thought, old women shouldn't be driving when they can't run their car... I told her to stop by and when I went out to check it... the tilt is jammed solid, won...
2002 Cadillac DeVille DHS 4.6L Accessories VIN: 1G6KE57Y72
when stopping vehicle, gas guage drops to empty and then returns to normal. radio will turn off. security light will illuminate.
1956 Chevrolet 4dr wgn 5.7L Poor Idle Quality, Hesitation, Surge VIN: 1956CHEVYW
Computer has been reflashed by a hot rod place in Tx. when I accessed under generic OBD2 it once showed LT1 +24% LT2 +24 % short term shows 0 both banks. Next time I try to access it acts like there's no ignition power to computer Don't have a legit vin so can... Trouble codes: P0560
1984 Chevrolet Corvette 5.7L Misfire VIN: 1C1AY0786E
I have a corvette here that is killing me. It is missing on #5 and #6 cylinders, mostly #5. The block learn is 108 but the plugs all look good and they are new ac delco. The car has new plug wires on it because two of them were burnt thru to the manifolds. Bot...
1993 Chevrolet G20 Sportvan 4.3L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1GBEC25Z2P
Vehicle brought to me from another shop...customer stated that after an electrical storm that knocked out the central air in their home, the van then had a lack of power and would not shift..and the MIL was lit.The other shop stated no comunication with scan t...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W3V
hello, need some help with this one. got this blazer 4.3 [w] motor-no start-cranks over ok. has spark, has fuel pressure, injector pulse. fuel pressure key on 60psi-cranking over has around 61 psi. ck compression all close to 205 psi. will start if brake clean...
1998 Chevrolet Malibu 3.1L coolant VIN: 1G1ND52M9W
after all the repair i still get this car back caz it is over heating , and customer just sees the temp gauge on the dash . it stays up , car is boiling back what test would you do on it
1998 Chevrolet Malibu 2.4L MIL Lamp on VIN: 1G1ND52T7W
Customer brought car in for check engine light. Customer had PCM changed, but not from us. Code U1000, Class 2 Serial Communications problem. We checked fuses, wiring, and relays. Everything looks good. Took vehicle to Chevy garage and had computer reflashed. ... Trouble codes: U1000 (Class 2 Serial Communication Problem)
1998 Chevrolet Malibu 2.4L Misfire VIN: 1G1ND5ZT8W
This thing eats coil housings...I have replaced the housing three times and coils, plugs and boots. It runs fine for about 2 to 3 months and burns out another housing...Anything I'm missing?
1999 Chevrolet Express 3500 5.7L right front brake VIN: 1GCHG35R3X
Hello and I hope someone has seen this before..please!!! This is an electrical contracting van. When I first looked at this vehicle both rotors were really warped and in need of front pads. We put new premium rotors,pads and seals in them.I cleaned and repacke...
2000 Chevrolet Express 3500 LS 5.7L Hesitation, no power under load VIN: 1GAHG39R8Y
This van has no power. On hills, its top speed is 60 WOT. Customer has lived with it for 6 months now. After replacing the primary bank one O2 sensor(dead as anything!) and tuning it up with plugs and cap and rotor, the van ran awesome up a 3 mile hill. Then I...
2001 Chevrolet Silverado 1500 5.3L 4wd VIN: 1GCEK19T91
Hi Techs, This Chevy Truck has the "4WD Service" lamp on and has no 4wd/high,4wd/low or neutral availble,only 2wd. None of the bulbs light at the switch except briefly when engine cranked,other wise inop all the time. Codes CO315:Motor ground circut open ...
2005 Chevrolet Malibu LS 3.5L Unknown VIN: 1G1ZT52805
i have this 2005 malibu the body control was stolend i would like to konw if i bought one new dos it comes program with the millage i have a tech 2 also the ts2000 or i have to send it to the dealer
2007 Chevrolet Uplander 3.9L Unknown VIN: 1G3FC3545S
this vehicle has a driver warning in the dash that says "service stability system". the odometer does not display at that time. Any ideas what this refers to. How can I correct this?
1995 GMC Jimmy SL 4.3L Compressor VIN: 1GKDT13W5S
We have changed compressors 5 times! Replaced compressor mounting bushings. We've tighted the belt manualy and loosed it. The system will run for hours (not cycling) holding 32/200 psi. Hold the throttle and almost the same. Let go of throttle and a growling n...
2001 Oldsmobile Alero GL 2.4L Accessories VIN: 1G3NL12T31
cannot commicated witn bcm or pcm, insturment panel does not work but drive and performs okay
2003 Oldsmobile Alero GL 3.4L MIL Lamp on VIN: 1G3NL52E93
3 times in the last year this car has turned the service vehicle soon light on. it happens on wet days and/or after a false start. if i stop the engine and restart the car the light goes out.codes are u1040, u1088, c1298. i have checked the wires at the (ebcm)... Trouble codes: U1040 (ebcm), U1088 (sdm), C1298
2000 Pontiac Grand Prix GTP 3.8L a/c compressor VIN: 1G2WR5212Y

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L abs light VIN: 1GHP53L8PH
I'm really not sure How or Why, but we decided to try a Used Pump ($75.00 compared to $700.00 new) , and Wa La ! All fixed ! I have no idea, with the defective pump, why we couldn't erase the codes or why they were even there, but the car is fixed. Thanks All,...
1994 Cadillac DeVille Concours 4.6L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G6KF52YXR
Well we finally had the customer return the car, all we have been able to try is checking all grounds, so far that has not fixed the problem, we will post a repair as soon as we get one. thanks for all the responces. Trouble codes: P0032, P0095, P0071.
1996 Cadillac DeVille 4.6L Cuts out, Stall VIN: 1G6KD52Y2T
I would like to thank Nick [...] Hey you Guys hit the nail on the head. I checked the fuel pump Relay Replaced it with a new one and made sure that i had a good connection, and we let it go i have ...
1994 Chevrolet S10 Blazer Tahoe 4.3L transfer case VIN: 1GNDT13W5R
Hello and thank you all for your time, the customer is still driving the vehicle and is going to bring it back to me in a couple of weeks, i got lost of good ideas, mostly connection related tests that i will do when i see it again.
1995 Chevrolet C1500 5.0L poor pedal feel VIN: 1GTEC14H9S
Thank you to all who replied. After reading all the ideas from our nations professionals, we performed more testing and discovered that the master cylinder was bypassing internally after the pedal travel exceeded a certain point. So dead plugging the master wa...
1996 Chevrolet S10 4.3L turn signals VIN: 16CDT19XXT
IT was the flasher. Unbelivable. So even the hazard lights are working, the flasher could be bad!? Thank You all
1999 Chevrolet Monte Carlo LS 3.1L Intake gaskets VIN: 2G1WW12M3X
Thanks for the 37 replies! Wow. I received replies from both ends of the spectrum, from just replacing the intake gaskets, to pulling heads, to replacing the engine. I performed a compression test, leakdown test, checked oil psi cold and hot (46 psi). All was...
2000 Chevrolet Malibu 3.1L Misfire VIN: 1G1NE52J74
thanks again to all who responded,finally got another look at this malibu. many of you suggested testing fuel injectors, with OTC scanner i was able to do an injector balance test, #5 cylinder carried more of aload than cylinders#1,2,3,4,&6. did compreesion te...
2002 Chevrolet Impala LS 3.8L Compressor VIN: 2G1WH55KX2
Thanks for your input. a new bcm repaired the A/C problem, alldata never mentions this in diagnostic charts nor does GM. if you look at wiring diagram for compressor you will see it there. signal is supplied from HVAC module to BCM on dk grn/white wire in smal...
2004 Chevrolet C6500 Kodiak C6C042 7.2L runs out of diseal VIN: 1GBJ6C1C04
Sorry it took so long to reply back.Looks as if it may have been a stoped up vent line.I blew air through the vents,and checked all lines.Noticed that the fuel is going down on both tanks equal.Thanks to Doug from Oklaoma,Matthen from Connecticut,Kenneth from ...
1994 GMC Safari SLE 4.3L Starting VIN: 1GKDM19Z6R
i'll call this one fixed. thanks to all and special thanks to john for offering to fax a wiring diagram, but i already had one. the big question here was where the positive current was coming from to feed the injectors and coil. Richard was correct it was a...
1998 GMC Jimmy Envoy 4.3L instrament panel VIN: 1GKDT13W8W
Thanks to all. I think whats going on is that the abs module has an issue but have no way to test. I have intermint pcm code reading ability and found some abs cobes and pcm codes.I unhooked the serial data II comb connector and removed each module one at a ti...
2001 Oldsmobile Intrigue GX 3.5L No Start VIN: 1G3WH52H61
Well this one is fixed. Thanks to all your help. It ended up being a bad computer ground. The wierd thing is, we checked & checked them originally, but apparantly we had a stray. Thanks Kevin & all of you for responding. Another happy customer! Trouble codes: U1301.
1997 Pontiac Grand Am GT 3.1L Charging VIN: 1G2NW12M2V
Thanks to all that offered help, my apologies about taking so long to post this summary. Unfortunately the issue was not corrected but it may be normal. The customer decided to take the vehicle as it is. Fair warning this post is lengthy. There where basi...
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