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Prev Professional Automotive Repair Technical Discussions for December 13, 2007
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Open Help Requests for GM
Help Request Answers
1978 Cadillac Seville 5.7L No Start, Cuts out, Stall
hello! this wonderful caddy has come in for a hard/no start cold. most of the time you can start it and it will idle for about 2 second then die. if you start it and start pumping the throttle it will run but very badly, it pops back through the intake like it...
1998 Cadillac Catera 3.0L radio,locks,dome VIN: W06VR52R3W
hello , problem is radio, just "lock" function of power locks, courtesy lights/map lamps inop. locks & radio do not work anytime ,however courtesy lamps only work key off.already check fixes ,most had problems with battery safe guard relay for simular concerns...
1997 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W4V
replaced fuel pump wouldn't hold fuel pressure when pump shut off pressure went to 0 the fuel was returning through the pressure line pump must of had a bad check pump customer supplied from advance auto has 60 psi but drops to 30 psi in 5 min.still ...
1997 Chevrolet Cavalier 2.2L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G1JC5244V
car was brought in as crank but no-start pulled plugs found them fouled with fuel and worn replaced plugs got vehicle to start but ran very bad and no power watched data on mentor found timing adv all over the place pulled front cover found tensioner in pieces... Trouble codes: P0300, P0171
1999 Chevrolet C1500 Suburban 5.7L radio VIN: 3GNEC16R1X
pulled radio discconected plug on rear of radio,radio shuts off problem in radio has anyone had this problem before
1999 Chevrolet K1500 Suburban 5.7L Lock-up VIN: 3GNFK16R2X
Greetings to you all, This vehicle has a 4L60E trans. It came into our shop with no reverse, 2nd or 4th. So, we did not have the oportunity to drive it extensivly prior to repair. Of course the sun shell had failed and there was general wear and tear. So, we r...
2001 Chevrolet Astro LS 4.3L Poor Idle Quality VIN: 1GNEL19W21
This vehicle was towed into our shop as a no start. When we tried to start it , it seemed to be flooded. It finally started after cranking it with the throttle wide open. After it started, it seemed to idle a little rough. It had codes 172 and 174 in history. ... Trouble codes: P0172, P0175
2001 Chevrolet Blazer LS 4.3L back up lights VIN: 1GNDT13W91
back up lights still non functional after info performed in related history. any help please!
2002 Chevrolet Trailblazer LS 4.2L left low beam headlight VIN: 1GNDT13S42
vehicle was in a month ago w/low beam on left side inop. found connector and bulb melted(circuit 712). replaced bulb & harness, harness was ACDelco-bulb was a Wagner 9006U HB4. checked for voltage drop:ok. released vehicle to customer. vehicle is back with sam...
2002 Chevrolet Avalanche 1500 5.3L Cluster VIN: 3GNEK13T52
Hi guys I have this good customer of ours that has this truck that has an interminat dead battery,everytime I check for a battery draw it has less than 30mA.Also he says that the tow/hual light and cargo light is flashing on the cluster but nothing is on nor c...
2003 Chevrolet Express 2500 4.3L No Start VIN: 1GCFG25X13
The van will start with no problem part of the time. When it starts it runs with no problems at all. When it does not start it acts as though it is out of time, cranking hard and popping back through the intake. Computer says it is in time. Problems started af... Trouble codes: P1626
2003 Chevrolet Suburban 1500 LS 5.3L pcm b VIN: 3GNFK16Z33
we have this 2003 suburban that blows the fuse for the pcm b circuit as soon as the key is turned on. checked all wiring to pcm and ignition and all seems to be good. any ideas would be helpful.
2003 Chevrolet Cavalier 2.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G1JC12F93
misfire at idle rpm just above idle skip goes away Trouble codes: P0300
2005 GMC Sierra 2500 HD 6.0L No Start VIN: 1GTHK29U65
Hey guys, We got this vehicle towed in from another shop. customer wanted a second opinion.The previous shop said that they had no communication from scan tool. We confirmed but replace a blown fuse and got a data stream reading. It has a code po336 set (Crank... Trouble codes: P0336
1998 Pontiac Bonneville SE 3.8L temp control unit? VIN: 1G2HX52K1W
Checked for proper coolant level and thermostat operation. Heater core is flowing good and vehicle's coolant temp. runs around 205. This vehicle has an automatic temp. control unit and all functions seem to be working properly. (besides the temp) Pulled the gl...
1999 Pontiac Grand Prix GT 3.8L No Start, Stall VIN: 1G2WP52K7X
First time posting.Thank you in advance.Cust drove to shop with intermittant stall and sometimes not starting.Did exsperiance problem often. Replaced ign module,ran in shop for a hour with no problem, released vehicle. Two days latter towed to shop.No spark go... Trouble codes: P0336, C0236 (EBCM no rpm input signal 1)
2000 Pontiac Montana 3.4L Poor Idle Quality, Cuts out, Stall VIN: 1GMDXO3EOY
hey gm guys, i have a montana that likes to stall or chug than cut out, can't find anything wrong, only dose this in revers, has any body come across this, thanks in advance

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Regal LS 3.8L Turn signals VIN: 2G4WB52K32
Thanks to everyone who replied. Big thanks to Joseph from New York. The info you sent helped big time. I checked the ignition switch and did find a voltage drop on the pink wire out of the igniton switch which is a feed wire for the wiper circuit and a few oth...
2001 Cadillac DeVille 4.6L Accessories VIN: 1G6KD54Y11
The customer has been driving the vehicle every day and not had a problem with the battery going dead. I feel this will happen again but at this point he does not want to spend any more money.
1986 Chevrolet K30 Custom 6.2L headlight VIN: 1986CHEVRO
1990 Chevrolet K2500 Cheyenne 5.7L Hesitation, Cuts out, Stall VIN: 1GCGK24K7E
Well the vehicle is fixed. Got a lot [29!] of replies and not a bad one in the bunch. A lot of them were close but I'll summarize we did and found as all of these were suggestions given or things we tried ourselves. Exhaust backpressure: I had my gauge hooked ...
1996 Chevrolet Lumina 3.1L Sarter, and charging system VIN: 2G1WL52M35
ok...sorry to take so long to post this fix. i talked to my boss today, and he says the customer says all is well with this car, even though he didn't bring it back in for me to re-check myself(which i would've prefered). i stated in the update, althoug...
2000 Chevrolet Malibu LS 3.1L Valve Train VIN: 1G1NE52J7Y
Thank you for the many helpful replies. We highly suspect the rocker arms or camshaft to be worn excessively. The problem still exists, and the vehicle owner has elected not to fix or repair, but to sell the vehicle "as-is".
2002 Chevrolet Impala LS 3.8L transmission VIN: 2G1WH55K22
2002 Chevrolet Express 2500 5.7L ABS Module VIN: 1GCGG29R92
Replaced ABS Modual. Now no light. Thanks for all the help
2003 Chevrolet Monte Carlo SS 3.8L Unknown VIN: 2G1WX15K93
Gentlemen, thank you all so much. After getting so many responses and basically all the same I replaced the hub assembly again. This did indeed fix the problem. After the fix and talking again with this customer I found out that her cousins boyfriend had in...
2005 Chevrolet Suburban 1500 LS 5.3L Starting VIN: 1GNFK16Z85
This one was prtty simple once I put the fuel pressure gauge on it. It would fire up right away if you cycled the key for the 2 second pump prime a couple of times before starting. When you shut it off the pump pressure dropped like a rock. He has a service co...
2007 Chevrolet Tahoe LTZ 5.3L wiper pulse VIN: 1GNFK13097
Thanks to all who responded,another lesson learned concerning new technology.The wipers are not supposed to work in the pulse mode unless there is water on the windshield,period.In this case,the rain sensor at the top of the glass was defective and,basically,t...
1995 GMC Jimmy SL 4.3L Hesitation, Cuts out, Stall, Misfire VIN: 1GKDT13W5S
it took awhile but this vehicle is fixed. thanks for all the advise. after 2 after-market fuel pumps, which only could produce 60 psi max, we installed a factory GM pump. started vehicle and it ran great...for about a half hour, then back to running like junk....
2003 GMC Yukon Denali XL 6.0L Suspension VIN: 1GKFK66U73
Thanks for the help, a few of you mentioned bad fluid and bad master cylinder and I was sure that wasn't it because the stability codes and light would come on and it was never during braking. However we took the master cylinder apart and there was oil in the ...
1985 Pontiac J2000 Sunbird 1.8L Thermostat housing VIN: 1C2JC6702F
Thanks to the members, that offered help. I have been unable to find the correct t-stat housing. The aftermarket parts are not the correct piece. The OEM part was discontinued in 2006, and numerous searches have not been succesfull. I have done a search of use...
2001 Pontiac Grand Am SE 2.4L No Start, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2NF52T81
Thanks for the replies. Jeff from Ohio and Ward from Pennsylvania were right on with the defective coil housing. We replaced the standard ignition piece with a delco unit and all is good now. Thanks foe taking the time to offer use help. Trouble codes: P0336 (crank sensor), P0300 (miss does not show up on data screen).
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