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Prev Professional Automotive Repair Technical Discussions for January 21, 2011
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Eldorado 4.9L Dash/air ride VIN: 1G6EL12B4P
Thanks in advance.IPC is a parcial digital.Speedo and tach is analog.Problem is with ignition off and key removed the dash will intermitantly light up and the air ride compressor will operate(after exiting vehicle).All info I have found addresses only complete...
1991 Chevrolet Blazer Silverado 5.7L Poor Idle Quality, Hesitation VIN: 1GNEV18K3M
I inherited this when last teck quit would appreaciate any help I can get thanks. I have driven this blazer and it stumbles/hesitates under part throttle it runs good when you get on it and seems to cruise ok. no miss fires good vacuum idles a little fast at 1... Trouble codes: P0033
1993 Chevrolet Cavalier Z24 3.1L Poor Idle Quality, Surge VIN: 3G1JF11T6N
Hi there this is my first help request and it is an old cavalier with a 3.1L. It has a surging idle when in drive at idle at a stop sign. I have reviewed the data in the following PIDS at idle: BARO 4.76V MAP 1.5V IAC 17-30 counts Fuel Trim 100 TPS .56V Now ... Trouble codes: 35 (IAC problem)
1999 Chevrolet S10 4.3L Engine VIN: 1GCCS19X5X
Owner said she was driving along and engine began to miss severely. Her dad drove truck to shop and it has complete miss on both one and two cylinders. Also when you crank engine, it tries to kick back a little although not real seriously but easily noticable ...
2002 Chevrolet Malibu 3.1L No Start, Stall, Horn honks after sta VIN: 1G1NE52J42
Hello all. I have a 2002 malibu 3.1L with 66k. Customer complaint is occasional no start and dies while driving one time but restarted. I have not been able to duplicate problem yet. No codes in any module using tech2. fuel pressure 56psi idle and maintains go...
2003 Chevrolet Silverado 2500 HD 6.0L MIL Lamp on VIN: 1GCHK24U83
Vehicle originally came in needing quite a bit of work after being purchased by customer. Did complete tune up (plugs, wires, fuel filter, fuel pump pressure & volume test) installed lower intake gaskets due to vacuum leak and lean codes. Replaced downstream o... Trouble codes: P0138 (O2 signal high bank one sensor two), P0140 (Low o2s activity bank one sensor two), P0158 (O2 signal high bank two sensor two), P0160 (Low o2s activity bank two sensor two)
2007 Chevrolet Cobalt LS 2.2L Stall, Misfire VIN: 1G1AL55F27
cylinders#1&4 briefly missfire in below 0 degree weather. have yet to duplicate missfire. customer also states slight / brief shudder uphill under hard acceleration.fuel pressure in spec ,spark plugs new , compression @ 175# . checked for vacuum leaks when war... Trouble codes: P0300
2003 GMC Sierra 2500 HD 6.6L No Start, very hard start
truck has a hard start problem. turns over good, no air leaks in fuel system found, glowplgs work good no intake restrictions. problem occurs after it has been sitting for a while, hot or cold. runs good once running and doesnt smoke. if you shut it off, will ...
2006 GMC Sierra 1500 SLE 5.3L Mechanical VIN: 2GTEC19Z46
Rubbing, scraping noise, at all engine speeds, sounds a little bit like a dry, noisy drive belt but belts have been removed with no difference; seems to come from lower part of engine or possibly from front of flex plate; first removed pass. Side valve cover a...
2003 Hummer H2 6.0L Blower VIN: 5GRGN23U63
03 H2 Hummer Blower motor runs all the time with key on or off. The first time I worked on it I checked out the wiring an everything check fine. I came across a serive bulletin # 04-01-39-009C Which discribes the problem I'm having an it required replacing the...
2007 Saturn Vue 3.5L PPS(Pass Presence System) VIN: 5GZCZ53447
Customer stated that SRS light would come on after a 20 minute drive. Customer also said that if he turned on the "pass seat heater"(front pass seat) that light would go out. When we first got it the SRS light was on and the pass seat heater switch was pushed ...

Fixes & Summaries for GM
Fix/Summary Answers
2008 Buick Enclave CX 3.6L unknown VIN: 5GAER13748
Customer wanted us to check it out, thinking it wouldn't be a very big deal. However, It hasn't made the noise since that one day. We did receive alot of replies. The majority said to check the belt or alternator. Until it starts making the noise again we wil...
1990 Cadillac DeVille 4.5L Blower motor VIN: 1G6CD5332L
I received three response that all said the same thing: Ignition switch - seems this is a very common problem with these Caddys and can cause blower motor issues. But that was not where the problem was on this one. I found out that the control panel communica...
1998 Cadillac DeVille 4.6L Starting VIN: 1G6KE54Y1W
Yes I went back into the column and found that the wires had been cut off when I tightened down the column retainer. thanks for the help
2002 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y92
I would like to consider myself a very good A+ Technician. With that said I really screwed the pooch on this one. I swear that my boss and I had looked this up and that the front bank was bank one. Well boy were we wrong. Mark hit the nail on the head that ban... Trouble codes: P1359.
1994 Chevrolet Camaro Z28 5.7L Misfire VIN: 2G1FP22P3R
The customer has to save up for me to repair his Camaro! It seems that after he had the Distributor replaced the car ran much worse than it had before it quit. I'm betting on the rebuild and/or aftermarket distributor.
1997 Chevrolet Malibu LS 3.1L fuel gauge
used a wire to move the gauge needle down 180 degrees, and it worked thanks
1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 1GNFK16R1X
Thankyou all very much for your help. What I am going to call the fix on this is a combination of shimming the crank sensor and THEN doing a ckp variation relearn. I had done the relearn several times, but it didn't seem to work like I'm used to. It didn't hit... Trouble codes: P0300.
2002 Chevrolet Silverado 1500 LS 5.3L Transfer Case VIN: 1GCEK19T62
Thanks to everyone that offered their help. Sorry for the delay getting back with everyone but we have been extremely busy. Well after replacing the transfer case & encoder motor & trying a different tccm & control switch (all did not fix the problem) we actua...
1998 GMC K1500 Sierra SL 5.7L No Start, Poor Idle Quality, Stall, Misfire VIN: 1GTGK24R9W
Thank you all for your help. Fuel volume was good, the crankshaft position sensor wiring was good. The distributor drive gear was good, and there was no play in the distributor shaft/housing. There was no moisture in the cap or rotor (it's been below freezi... Trouble codes: P0108.
2005 GMC Envoy XL SLT 5.3L air ride bags VIN: 1GKET16M95
after a few days... rear suspension completely gave out, does not inflate at all. you can hear air pump operating but bags was still at a stand-still. so i rechecked for leaks and none was found!!! rechecked leveling sensors and both seems to be just fine... d...
1998 Saturn SC2 1.9L battery drain VIN: 1G8ZG127XW
I havent got the car back yet but the owner called me this week and said his wife was driving the car and the dome light came on, so I know what the problem is. Most of the replies said that the draw I measured was not abnormal. I was figuring the same and cou...
2003 Saturn Vue 2.2L Pulls Left VIN: 5GZCZ43D03
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