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Prev Professional Automotive Repair Technical Discussions for August 15, 2012
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Open Help Requests for GM
Help Request Answers
1998 Buick Riviera 3.8L No Start, Cuts out, Stall VIN: 1G4GD2217W
Car dies intermittently and will not restart until later. Scan codes , non present
1970 Chevrolet Monte Carlo 5.7L rocker noise
side to movement of rockers is the problem along with the tic the heads are stock the push rods stock the cam is mild the steel rockers are stock all parts new clueless any sugg greatly appreciated from those of u with more experience in this are...of course i...
1995 Chevrolet K1500 5.7L Ac Temperature VIN: 2GCEK19K4S
Hello fellow techs. Have a interesting issue. Have a 95 1500 chevy pu that intermittantly looses cold air. When you turn headlights on. Ac will be cooling fine. Pressures 175/35- center air duct temp 40 degrees. When you turn headlights on goes to full heat. F...
2001 Chevrolet Malibu 3.1L Surge VIN: 1G1ND52J71
Vehicle operates normally until it is up to temp. Once it is up to temp it will surge in 3rd and OD only. Only under light to mid acceleration and until lock up comes on. It actually feels almost like you are sitting in a rocking chair. It is not a miss and al...
2003 Chevrolet Malibu 3.1L alternator VIN: 1G1ND52J23
Got some suspicions on this, but would like some verification. vehicle came into shop with charge light & ABS lights on, only charging 10.8. replaced the alternator and we still have no charge, cleared PCM codes and checked again, still nothing. Do I have a bu...
2005 Chevrolet Silverado 3500 6.6L MIL Lamp on, Hard Start at Times VIN: 1GBJK39215
I have this 2005 Chevy 3500 Duramax 6.6L LLY. It will run perfectly fine and have plenty of power... except for every once in a whial it will set a code P1093 and will go into a "limp" mode not allowing fuel pressure over 11,000 PSI. At that point the RPMS won... Trouble codes: P1093 (Fuel Pressure Low During Power Enrichment)
2005 Chevrolet Trailblazer LS 4.2L blower motor/noise from vents VIN: 1G2NE03915
Greetings, This trailblazer came in with an original complaint of an intermittent noise when driving. I have been able to duplicate the noise in the bay with the blower motor on (a/c on/off doesn't seem to matter), reving engine to 3000 rpm. it makes a high p...
2005 Chevrolet Express 3500 LS 6.0L Poor Idle Quality, Stall, Misfire, MIL Lamp on VIN: 1GAHG39U15
Van towed in 2 months ago running poorly. Found cracks in manifold. Sprayed with carb cleaner and engine smoothed out. Van was pulled in and out of shop every day running progressively worse. Boss finally gave me ok to fix 2 days ago. Job went well. Also repla... Trouble codes: P0300
1995 GMC W3500 Forward W3S042 5.7L engine VIN: J8DF5A120S
It is a 95 w5500 box truck with the diesel engine, and at about 30 mph it would have a definite decrease in power. Now it wont idle. Will start with accelerator on floor then dies. Any suggestions?
2001 GMC Yukon XL 1500 SLT 5.3L fuel gauge VIN: 3GKFK16T11
local dealer dropped this on me. customer has tried two new fuel sender units and had cluster sent in and tested ok. i can command all other gauges with scanner except for the fuel usually stays at one quarter tank but scanner will show 55% fuel in ta...
2004 GMC Envoy SLE 4.2L Gauges VIN: 1GKDT13S24
This is my aunts vehicle and it has been acting up intermittently for a while now. The problem is the gauges quit working some times and the lights all come on when the gauges quit. I have looked around on the internet and have found many failed clusters in th...
2005 GMC Envoy XL SLE 4.2L Drivers side door module VIN: 1GKET16S95
Now the window goes down fine, when going up it goes 2" stops finger off switch and back on another 2". Same from the drivers door switch and passenger switch. The window works fine when operated with the Tech2. I am thinking I may have a bad new module. Also ...
2000 Oldsmobile Intrigue GLS 3.5L Timing Chain VIN: 1G3WX52HXY
Ok this Intrigue came in on a tow truck with a crank no start. The customer had the motor rebuild (allegedly) a few months ago and it came in with the crank shaft turning and the cams not. THIS IS A CHAIN NOT A BELT MOTOR. Does anyone know if this is an interf...
2001 Oldsmobile Silhouette Premiere 3.4L Heater Case VIN: 1GHDX13E11
Customer complant is water on the drivers side floor. So i blew out the drain tube for the heater case. i see no sign of water leaking down the fire wall from the windshield. Has anty one seen this on the olds vans?
2001 Oldsmobile Aurora 3.5L Mode switch VIN: 1G3GR64H41
Thanks for taking the time to help on this, I have this 01 Aurora with the 4t65e transmission. When warm the car will not crank (no starter engagement), if you move the gear shifter to neutral it will crank. We have determined it to be the neutral saftey switc...
2001 Pontiac Grand Am SE 3.4L Security VIN: 1G2NF52E21
Car came in with no start condition. Scan tool will comm with everything but BCM. (body control mudule)Tried pass lock relearn no go. Security light on constantly-not flashing. Replaced Ign switch,no go. Constant codes P1626 (Anti-theft system fuel enable c...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Cadillac DeVille 4.6L Misfire VIN: 1G6KD52Y8T
Thanks very much Richard, Tadd, Robert, Michael, and Nathan. All of you were correct. I haven't seen a module die on 1 set. I lived now I learned, and I will remember. I appreciate the explanation as why the ICM could fail. The customer having just a month ... Trouble codes: PC030, PC138.
2001 Pontiac Grand Prix GT 3.8L no inj pulse VIN: 1G2WP52K71
Techanically I never found the bad connection, but instead I found both wires under the fusebox, (The relay output and the fuse input)I installed a jumper between the two and the car has been runnig fine so far. Sometimes I make life hard for myself, but it re...
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