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Prev Professional Automotive Repair Technical Discussions for May 1, 2009
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Open Help Requests for GM
Help Request Answers
1993 Cadillac Fleetwood 5.7L Starting VIN: 1G6DW5272P
Techs: Central Control Module is not allowing fuel enable due to bad module and is no longer there a way to bypass fuel enable on this...I thought the DK/Blue on pin B1 is grounded allowing fuel but seems to be more to it than that...thanks for ...
2002 Cadillac Seville SLS 4.6L No Start, Stall VIN: 1G6KS54Y32
Hey need some help from the Caddy guys, Car came in from as a new vehicle to our shop. The customer doesn't know whether to trade it or pay to have it fixed. The vehicle intermittently stalls, and sometimes restarts sometimes doesn't, and all power is lost, in...
1991 Chevrolet Corvette 5.7L flywheel VIN: 1G1YY2387M
we removed the transmission to replace the flywheel and clutch assy. when we removed the duel mass flywheel we found that someone had changed it before. the bad news is they didnt put the balance weights in were needed. i need to know if and how to get the fly...
1993 Chevrolet K1500 Cheyenne 5.7L Cuts out VIN: 2GCEK19KOP
Most recently in February, the vehicle came in with a no start condition and we found the pick-up coil in the distributor to be bad. Since it had a gang of miles on it we replaced the entire distributor assembly. Vehicle has been fine until recently. As you dr...
1993 Chevrolet Lumina Euro 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 2G1WN54T5P
cust. came in with sugar in the tank i guess he made his wife pretty mad. replaced the fuel pump, filter, all 6 injectors flushed the lines and cleaned the tank. starts up and runs fair. If you give it gas anything after about 50% throttle it fall on its face....
2001 Chevrolet Silverado 2500 HD 8.1L Stall VIN: 1GCHK23G81
hello group 01 chevy 2500 with an 8.1 need to get broken crank sensor out of the block, i am thinking i will need to pull the trans then push the sensor out, does anyone have a better way. read about another guy that removed the oil pan but ended up pulling tr...
2003 Chevrolet Silverado 1500 4.3L MIL Lamp on, LEAKING FUEL VIN: 1GCEC14X03
after running truck for an hour we couldnt get it to leak- so after check on scanner found it was not venting and the purge sol was 0%. i put an aftermarket fuel pump in and think it is possible that the pressure sensor is part of it that could be bad. not sur... Trouble codes: 455 (evap large leak)
2003 Chevrolet Silverado 2500 HD 6.0L Misfire, MIL Lamp on VIN: 1FTSX21Y06
First Post - New Shop :) Truck is not running on the Left Bank , Cylinder #6 not running on the right bank. Fuel trim on left side is at 50%, Oxygen sensor voltage is low. We replaced the O2 and reset trims. Suspected broken valve spring - removed valve cov... Trouble codes: P0300
2004 Chevrolet Express 3500 6.0L Cooling Systems VIN: 1GBJG31U64
ok customer says when runs truck for along time it heats between 200 and 260, going down road seems to cool off some but when he stops it reads hot.does not loose coolant,ok when all this is going on check engine lite comes on,flashing code p0300,i can not get...
2005 Chevrolet Silverado 2500 HD 6.6L Cuts out, Stall, MIL Lamp on VIN: 1GCHK23235
Hello everyone, I need help with a chevy diesel. We have three codes stored, PO335, PO341, PO0016. Do not have much time working with newer diesel engine's. We have replaced the cam and crank sensor's. Have checked the reluctor wheel as best we can for the cra... Trouble codes: P0335, P0341, P0016
2005 Chevrolet Impala 3.4L ebcm/wheel sensor VIN: 2G1WF52E85
This car is giving me fits. Car came in with rf wheel speed sensor code 2 weeks ago. Found cut wire on sensor/hub unit and replaced. Cleared code and test drove appeared problem was solved and returned to customer. Now the car is back with LR wheel speed senso...
2006 Chevrolet Silverado 1500 LS 5.3L left temp actuator VIN: 1GCEC19X36
This truck is about to drive me insane!!! Came in customer complaint always hot on drivers side. For 2 days it had no problems. Yesterday morning it went hot on drivers side. Code 414 Crt 1 feedback performance. I check the output with scan tool and the contro...
2007 Chevrolet Suburban 1500 LS 5.3L Accessories VIN: 1GNFC16J97
Hello to All. Calling all GM factory techs. I have this suburban that has on the instument dispay- "REPLACE BATTERY IN REMOTE KEY". Can someone tell me how to turn this off or reset this? The remote key fob works great, ALL FUNCTIONS WORK! Just the message on ...
2007 Chevrolet Impala LT 3.5L poor power VIN: 2G1WT58N77
when the accelerator pedal is depressed to a certain possition the engine goes into limp mode until the key is turned off. then everything is normal. everything test good and it runs great except for this. has anyone run into this before and what was your fix.... Trouble codes: P2138 (accelerator pedal position sensor 1-2 corruption)
1997 GMC Yukon SLE 5.7L Charging VIN: 1GKEK13R8V
hello techs this vechile while driving intermitently starts to show a discharge on the volt gauge then the dash gauges like oil pressure drop oil lite comes on and check gauge lite on. if you shut vechile off its slow cranking like a weak battery. so now i tes...
2003 GMC Envoy XL SLT 5.3L engine temp VIN: 1GKET16P73
hi guys, this one has got me baffeled. truck came into shop running normal temp, cust states when towing his boat runs about 260 degrees, otherwise runs cool. i checked the fan and elec clutch, seems to operate normally. recommended a flush and stat change an...
1998 Pontiac Sunfire GT 2.4L Poor Idle Quality, Stall VIN: 1G2JD12T1W
Hi, car will not idle i have no vacuum leaks, car runs good but will not idle, checked intake for vac leaks-ok check for voltage at IAC-ok my question is with the IAC removed if I apply power and ground to it, the plunger does not move-is this correct? if i pu... Trouble codes: P0506 (idle air control)
2001 Pontiac Montana 3.4L No Start, Cuts out VIN: 1GMDX03E71
this vehicle will tend to stall and not restart when hot intermitantly. sometimes we can leave it run for 3 hours and it's fine, next time just start it up and after a bit of driving it stalls. during which there is no spark. has fuel pressure. there are the 3... Trouble codes: P1189 (Engine Oil Pressure circuit)

Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick LeSabre Custom 3.8L starter VIN: 1G4HP52K24
Thanks for the help. I ended up disconnecting the battery negative terminal. After reattatching it, everything went back to normal. Unfortunately now I can't see exactly what happened. I'm guessing one of the modules was dragging the system down ?
1994 Chevrolet K2500 5.7L stuck in 3rd gear VIN: 1GCFK24K2R
First of all thanks to all who replied. The problem that was confusing me was no codes. The scanner that I was using is fairly new to me and it was not showing any transmission codes and I did catch it right away. The scanner is the MAC Taskmaster. I switched ...
1995 Chevrolet Blazer 4.3L Stall VIN: 1GNCS13W6S
after all that replied we replaced the fuel pump and found that the previous repair facility had also broken the small metal overfolw of of the tank. we put a used fuel tank a new fuel pump and vehicle drives fine thanks for the help.
1995 Chevrolet Blazer 4.3L Poor Idle Quality VIN: 1GNCT18W45
Customer gave me the go ahead to check the timing chain. it had wear but nothing to wory about replaced engine with junk yard and replace the spider injector, it was all good customer happy and so am i. thanks for all your replys. Joe [...]
1999 Chevrolet Astro 4.3L Dome Light VIN: 1GNDM19W4X
I am happy to report this vehicle has been successfully repaired. Once the dashboard trim and A/C Trim, A/C controller and headlight switch were removed and out of the way, I was able to see that an "aftermarket" alarm system of somesort was installed, and on...
2001 Chevrolet p 30 5.7L MIL Lamp on VIN: 5B4HP42R01
Thanks for the help. The distubtor was out of time. It was not off on the gear but about 2 degrees out of time. We reset the timing. THe code has not repeated and truck has seccuffuly gone throu emmistions. I still I am not sure what the diffrence in this code...
2005 GMC Yukon Denali XL 6.0L Acceleration VIN: 1GKFK66U45
Thanks to all seven that replied. Based on your information regarding the traction control system being more sensitive than the abs and that we may not see a wheel speed sensor drop out on our Modis. We lab scoped the sensors and found a weak signal in the rig...
2000 Pontiac Bonneville SSEi 3.8L Misfire VIN: 1G2HZ5416Y
Gary THANK YOU so much. The term Carbon Tracking had completely left me. As soon as you said it, I thought what an idiot I can be. I was so stuck on the plugs coming out with the Carbon Tracking that I had not went any farther. I knew this was my problem I jus...
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