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Prev Professional Automotive Repair Technical Discussions for November 1, 2007
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Open Help Requests for GM
Help Request Answers
1998 Buick Park Avenue 3.8L engine VIN: 1G4CW52K7W
I have a 1998 Buick Park Ave 3.8 liter K code engine that blows blue smoke out the tailpipe; which means we have an oil burning problem. First off, this car came to me with a miss. Found #3 cylinder had a bad exhaust valve. Did a complete valve job, put it bac...
1999 Buick Regal GS 3.8L Cuts out VIN: 2G4WF521XX
This vehicle was brought to our shop with a stalling/not running problem. it will start and then shut off within seconds. We have determined that the fuel pump is not staying on. the signal is present for the fuel pump relay but this vehicle has a fuel pump sp...
1998 Cadillac Seville STS 4.6L power windows VIN: 1G6KY5496W
ever since we replaced the battery the power windows have a 5 to 10 second delay in both the up and down position but if the window is moving you can change direction immeditly no code are stored. many warning light came on after battery was replaced but went ...
1999 Cadillac Seville SLS 4.6L abs light on VIN: 1G6KY5499Y
it has codes c1248 c1254 and they dont give me any information about it on alldata or scannner. i hooded up my scanner to it and see i have NO DATA for .. lf tcs iso valve ..lf tcs prime ..lf wheel wheel speed..lf reaslease...rf tc...
2001 Cadillac Catera 3.0L cooling system VIN: W06VR54R71
have this wonderful opel here.i am currently replacing the oil cooler,radiator and all hoses etc.i am looking for suggestions for the best way to remove the heavy milkshake inside the cooling system.this is worse than anything ive ever seen.we are adding our f...
1995 Chevrolet Monte Carlo Z34 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2G1WX12X4S
Hi all.I have a '95 monte carlo with a 3.4 DOHC engine that has a dead miss on cylinders #1 and #2. The miss is always there wether at idle or higher engine speeds,under no load or with one.found that both spark plugs were fouled.I replaced all plugs and plug ... Trouble codes: 117 (coolant temp too low)
1997 Chevrolet C1500 Suburban 5.7L MIL Lamp on VIN: 3GNEC16R2V
First code in system was the P1133. replaced bk 1 sensor1. After drive cycle,second time of driving lite came on with code P1153 in system. Changed bank 2 sensor 1. Test drive and code P1133 came back. Now has PO133,P1133,P1153. Computer has latest update. Che... Trouble codes: P0133, P1133, P1153
1997 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R5V
i have a 1997 chevy suburban with a 5.7l i am trying to diagnose this for another shop out of town. the vehicle was running just fine and while driving it cut out and died. at this point they tested the batt, starter, and spark. all present. we are all assumin...
1998 Chevrolet K2500 Suburban 7.4L front brakes VIN: 3GKGK26J1W
I have a 98 k2500 suburban that the front brakes slowing lock up on until they are completley locked up after driving 20-30 minutes. Originaly the vehicle came in for a front suspension overhaul and we also replaced the hydroboost due to leaking. After 20 days...
2000 Chevrolet Express 3500 5.7L Misfire VIN: 1GHC39R3Y1
Alright guys, this van has a misfire on cylinders 2,4,8 at idle. Above idle it runs fine. I was thinking vacuum leak or fuel leakege so i was about to take the intake off but i was thinking I would get a second opinion first. It also runs rough cold than hot. ... Trouble codes: P0141, P0171, P0175
2002 Chevrolet Silverado 2500 HD 6.6L Poor Idle Quality, Surge VIN: 1GTHK29102
Smokes at idle [fuel] idle surges, poor fuel mileage
2003 Chevrolet Tahoe LS 5.3L service 4wd light VIN: 1GNEK13T63
intermittant service 4wd light on, 4wd lights on mode switch go out has 16 history codes u1101, 1000, 1064, 1255 co300. 305 306 321 327 359 374 379 550 b0790 2725 unable to reproduce concern customers first visit has had this to gm for this and other issues un...
2004 Chevrolet Silverado 1500 5.3L ac and heater VIN: 1GCEK14V74
ok ,hope some one has seen this. car lot truck ,on one side it blows hot allthe time ,driver side.does not matter if the switch is hot or cold.pas, side works fine ,you can adjust cold & hot. customer replaced controll switches. this system has heat controlls ...
2005 Chevrolet Cobalt 2.2L Power Door Lock VIN: 1G1AK52F65
Power lock will not work with buttons inside car Will sometimes work with remote Will sometimes lock and unlock by themselves However car will start and run ok When the drivers door is opened the horn sounds and headlamps flash until engine starts Thank you in...
1994 GMC C3500 Sierra SL 7.4L manifold glows red VIN: 1GDJC34N0R
local driving no problem with mainifold, take truck on highway over 50 mph for 20-30 min, manifold gets red hot.
2002 GMC Envoy SLE 4.2L Parking brake VIN: 1GKDS13S62
This envoy failed inspection due to parking brake not holding. If I pump the lever a few times it feels ok and will hold the vehicle. If it is driven 2-3 miles you can pull the lever all the way up and wont hold. I suspect the auto adjuster problem. We work on...
2005 GMC c6500 8.1L dome lights VIN: 1GDG5C1E05
does any one have a complete wiring diagram for the cab and chassis for the c6500 series gmc??? have traced wiring to the point where i need the complete diagram to follow power to relays. and i dont have acess to one. any help would be greatly appreciated.
1999 Oldsmobile Cutlass GL 3.1L No Start, Cuts out VIN: 1G3NB52J3X
I'll start with the basics and history I know of this car. It was bought at a public action for $ 600.00 and was drove away ( The customer said this ) went 1 block to get gas and put 10 gal in it. As they were driving it home it started to miss bad and they be...
1994 Pontiac Grand Am GT 3.1L No Start, Stall VIN: 1G2NW15M1R
Hello fellow techs, this one has us stumped. Came in for a wide range of normal maintenance problems. Upon getting to the A/C inop was checking for power at the pressure switch, had power so I jumped it to the output of the connector to see if the compressor w...
1998 Pontiac Grand Prix GTP 3.8L radio VIN: 1G2WP5216W
I have a 1998 Gran Prix, GTP, came in with the complaint of check engine light coming on and traction control light coming on. When this would happen the tac would drop to zero. Have not been able to duplicate the problem. Hooked up to scanner and found code p...
2000 Pontiac Grand Am SE 3.4L ebcm VIN: 1G2NF52E9Y
Hello everyone thanks for your help. This car came in with the "service vehicle soon" on ,i did connect the modis and the code is P1040 NO COMMUNICATION EBCM/EBTCM. And i checked all powers and grounds to the EBCM and everythig looks ok i talked to the dealer...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Century Custom 3.1L abs VIN: 2G4WS52J82
Sorry for the delay. The customer opted for a used ABS unit. Had to wait on shipping. The ABS unit was the cure. Thanks to all for the help.
1990 Cadillac Seville 4.5L passkey VIN: 1G6KS536LU
I found an old PRI Sensor Simulator Tester that I hadn't used for years. By connecting the tester to the wire going to the computer and generating a frequency I got the engine to start. So I talked the customer into springing the $260.00 for a new Passkey modu...
1976 Chevrolet Camaro 5.7L Cooling Systems VIN: IQ87L6N512
Thanks for all the input. This vehicle was not too bad to remove the heater core. In order to remove the heater core. The middle consol ewill have to come out. Work your way into the the vent assembly. Passenger side fender lining has to come partially out. I ...
1999 Chevrolet Lumina 3.1L Misfire VIN: 2G1WL52M4X
Had 18 valuable replies, unfortunately all suggestions in the replies had already been performed. Customer opted to trade vehicle in at earliest opportunity and declined any more diag time.
2000 Chevrolet Silverado 1500 5.3L Hesitation VIN: 1GREC19T4Y
Adam from Ohio hit it on the head. Turns out to be bad gas. I dont under stand how it would not run off the motor vac machine either although. Took it out and and installed fresh gas now running fine. This truck belongs to a farmer and the first thing I asked ... Trouble codes: N0N.
2001 Chevrolet Blazer Xtreme 4.3L Misfire VIN: 1GNCS18WX1
After pulling my hair out several different times I went back to the basics and Bad Gas fixed this vehicle.
1996 GMC Yukon SL 5.7L willnot disengauge 4wd VIN: 1GEKEK13R2
Good evening Techs, Finally figured this out. The ground pin in the connector at the transfer case was not making good contact. I guess it was trying to ground through another pin and causing the erractic behavior. Tighten up the ground pin and everything is g...
2000 GMC Sierra 1500 SL 5.3L Cuts out, hard start VIN: 1GYEK19TXY
Thanks for all who replied. I put a fuel pressure regulator and another AC Delco pump and all is well. thanks again
2000 GMC C3500 Sierra SL 6.5L No Start VIN: 1GDH39F7Y1
2001 Pontiac Sunfire SE 2.4L cruise VIN: 3G2JB52T51
hi people.Sorry for the vage deatails I am one of the tech at the shop and it is my own car.The cruise has not been working for 8 days and between then and now i have checked all conectors and plug in and wiggle tested all componets all good,Tryed new cruise m...
2003 Saturn Vue 3.0L security system VIN: 5GZCZ63BX3
replies said check for remote start causing issues which this vehicle did not have, others said possable BCM or needed a reflash, the boss sent this off to the dealer and did not tell me what they did.
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