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Prev Professional Automotive Repair Technical Discussions for December 8, 2009
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Custom 3.8L Accessories VIN: IG4HP54K0Y
i have this lesabre door locks and window work on drivers door. but all other windows or locks do not operate from the main switch or there door switches.I have no wiring diagram for these vehicles .would like to know what power is supposed to be to the switch...
1998 Cadillac DeVille 4.6L no start VIN: 1G6KD54Y8W
Hello to all.. (HELP) This auto came to us with what I thought was a simple problem. After sitting for three to four days the battery goes compleatly dead. I have covered all the normal causes however,the boodie man is still there. I can't find a drain on the ...
2000 Cadillac DeVille 4.6L tcc VIN: 1G6KD54YOY
po741 stored for tcc lockup. ff data shows code set at 60 mph. after clearing code i road tested with scan tool monitoring tcc. tcc activity was normal showing duty cycle and normal deactivation with brake application. also the 100-200 rpm increase when tap br...
2003 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N43
I have this 03 Escalade, one of our recon vehicles, with misfires at idle. There are no misfires until the idle drops to 575-625 hot idle, park or in gear, then #5 misfire counter runs up steadily followed by #4 at a slower misfire rate. Any slight raise in rp... Trouble codes: P0300 (Random Misfire), P0304 (Misfire Cyl. 4), P0305 (Misfire Cyl. 5)
1984 Chevrolet K5 Blazer Silverado 5.7L fuel guage VIN: 1G8EK18H0E
Hello I have an 1984 blazer here with a fuel guage which wont go over 1/4 tank even if tank is full which it is full now signal wire to tank grounded till key is turned on then lose ground apply power to that wire guage goes past full apply grnd guage shows un...
1996 Chevrolet Cavalier Z24 2.4L Hesitation VIN: 1G1JF52T3T
Hey all. Having cold accel issues with this quad 4. origionally came in with leaking water pump. Customer says ever since pump replaced when car cold for first one to two minutes it acts like running out of fuel. fuel pressure remains good during failure. repl...
1998 Chevrolet Cavalier 2.2L No Start, Stall VIN: 1G1JC1241W
car towed back in and started right up was fine till next morning when I went to start it. The gauges were bouncing all over after reading other posts seemed like it was sure to be the IPC. We had the ipc sent out reinstalled cleared codes car was gone for a w... Trouble codes: P1629 (Theft fuel enable incorrect no signal), U1016
2000 Chevrolet Astro 4.3L awd VIN: 1GCDL19W9Y
I have a problem child here we have replaced the encoder mtr 3 time one used and two reman replace 4x4 module and ck wireing speed sensors seem to be reading the same if we put the van up on the rack all for tires off the ground sys seems to work fine then whe...
2000 Chevrolet K3500 7.4L Hesitation, Misfire, MIL Lamp on VIN: 1GCHK33J6Y
Gentleman, I have a difficult problem here. the truck misses and lacks power under heavy acceleration. On scanner it shows constant misfire on #3 cylinder, yet only code present is p0171. When I look at fuel trim it shows only 5% long term fuel trim on bank 1.... Trouble codes: P0171 (lean condition)
2000 Chevrolet C3500 7.4L fuel gauge VIN: 1GBKC34J3Y
customer complains that truck runs out of fuel with almost a half a tank showing on the gauge.This truck has duel tanks. Remove sending unit and tried a new one. No change. Boss decided that it must be the gauge, so we got a new cluster and put that in. No cha...
2003 Chevrolet Blazer LS 4.3L radio VIN: 1GNDT13X43
We have a 2003 blazer with a static noise from the radio we have replaced the radio with a factory radio and it still has the same static noise I cant find anything wrong with the wiring if someone has seen this problem before and could help it would be great ...
2003 Chevrolet Silverado 1500 5.3L abs module VIN: 1GTEK14T83
Truck came in with abs motor running all the time even with key off. Replaced abs module. A week later came back with motor running again. Install a second module (both are oem)and motor starts running immeadiatly. also need to mention that the only wires plug...
2005 Chevrolet Cobalt 2.2L Mechanical VIN: 1G1AK12F55
Transmission kicks out of 1st and 5th gear. Started as grind in 5th. Fluid is full. Has anyone had this problem?
2008 Chevrolet Silverado 3500 HD WT 6.6L front brakes VIN: 1GCJC33678
customer has complaints since new @ 0 miles. complaint is vehicle shakes violantly at times and more when hauling his 40 foot travel trailer weight about 12000 pounds. he complains more when driving up north when coming down hill. hills are about seven miles l...
1993 Geo Prizm LSi 1.6L No Start VIN: 1Y1SK5368P
hello, this car came into the shop with a miss. i started to troubleshoot the problem when i disconnected the plug wire it died and would not start. it now has no spark. tested the coil= primary resistance cold = 1.6 ohms, secondary 11 ohms cold. checked the c...
1999 GMC Jimmy SLT 4.3L temperture blend door VIN: 1GKDT13W3X
thank you in advance for any help or advice offered, this veh, came in with cust, complaint of 4wd not working and no a/c operation, we checked and repaired 4wd and proceeded to check operation of h,v,a,c,(with automatic temperture control) where we found that...
2001 GMC Sierra 2500 HD SLE 6.6L Poor Idle Quality, Hesitation, Surge, Misfire VIN: 1GTHK23311
vehicle has running problem at idle, cruise and acceleration. at idle it surges and misses intermittantly at wich time the act fuel pressure reading surgees upwards comes back down and smooths out. at cruise and acceleration it intermttantly surges and misses....
2003 GMC Yukon Denali 6.0L rear heat & front seat heater VIN: 1GKEK63U93
Vehicle came in with no rear heat and front seat heaters inop. The rear heat blows cold air only. I can remove the temp actuator and flip the blend door manually and get good heat.I tried swapping the actuators and still have the same problem and the control a...
1997 Oldsmobile Silhouette 3.4L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GHPU06EV5
car came in for rough running all speeds. engine will run for 2 seconds smooth when first started & then misfire. cleaned injectors with gm injector cleaner, vacuum readings normal. spark plugs are correct, firing order is correct checked coils for arcing subs... Trouble codes: P0300, P0304
2001 Oldsmobile Alero GL 2.4L No Start, Misfire VIN: 1G3NK52T11
When you install new ignition module they only last approximately 1 hr then car starts to miss. If you shut car off it will not restart. Diagnostics lead you back to defective module again. Tried 2 different name brand after market modules
1999 Pontiac Grand Prix SE 3.1L Camshaft VIN: 1G2WJ52M3X
One morning my wife autostarted the car to drive kids to school when she went outside the car was running rough and stalled out on her.When I checked the vehicle had PO300 multiple misfire codes and oil light was on my scan tool dosen't show data so I could't ...

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet K1500 Sport 5.7L MIL Lamp on VIN: 1GCDK14K2M
Wow, what a diverse set of answers! I've got from "take out the bulb" to " have a custom flash performed". My gut was right to go back to the beginning and start again. The new knock sensor was bad! went back over the flow chart (and much thanks to an old aqua... Trouble codes: 43 (est/circuit sensor).
2000 Chevrolet Tahoe 5.3L noise VIN: IGCGK24R9T
I wass unable to fix vechicle in dollar amount that the customer wanted to spend. I unplugged the abs module with no change. The noise was not coming from transmission or transfer case.
2000 Chevrolet Blazer LS 4.3L Reverse Gear VIN: 1GNDT13WT2
Yes everyone was right in their knowledge of the 4L60E having Sun Shell issues. Mine was wiped out. I recruited the help of a local transmission rebuilder with a great reputation in his work. Purchased "The Beast" Sun Shell from Summit Racing.com Hope to have ...
2001 Chevrolet Silverado 2500 HD 8.1L Front pump VIN: 1GCHK29G41
Well,guys the majority of the replies said to check the flywheel for a crack. A few said that the alison trans had problems with the front pump. We decided to just tear into into it and see if we could find the problem. It didn't take long. One of the torque c...
2001 Chevrolet Silverado 1500 5.3L wipers VIN: 2GCEK19TX1
after lawrence sent me a quick test procedure, we were able to quickly determine that we had indeed got a bad module. this was a brand new ac delco unit and not a a-1--very unusual-- had a few hours in this that i couldn't charge my customer for, so i guess th...
2002 Chevrolet Tracker 2.0L cooling system VIN: 2CNBJ18C42
I was hoping to close this post out after I did the repairs but, it's time to close this post. I'm replacing the head gasket and had the head shaved, it was warped a little. I also pulled and checked the water pump, the pump was fine. I've been waiting for the...
2003 Chevrolet Tahoe LT 5.3L Rear air temp door and Front air temp door. VIN: 1GNEK13Z13
The majority of the replies said the actuators were a problem on these vehicles. On the rear problem I switched the vent control motor with the temp control motor and the problem moved to the vent switching. Positive that the temp control actuator/motor is bad...
2003 Chevrolet Cavalier 2.2L Cooling Systems VIN: 1G1JC52F73
After much coolant and hairloss this one is fixed. The thermostat was installed incorrectly by one of my techs. And is now on probation, one more wrong move and bye bye. When you remove the thermostat (which I didn't do) my tech did, make sure you know how it ...
2004 Chevrolet Silverado 2500 6.0L Driver's temp door VIN: 1GBHC29U44
Well, the replies were unanimously slanted toward a bad temp door actuator, citing erratic behavior is very common. When I got a look at the vehicle finally, there was a code b0414, for a lost feedback signal to the left temp door actuator. Upon further inspec...
2005 Chevrolet Express 3500 6.0L trac control & engine operation VIN: 1GAHG39U95
It's Fixed! Richard, Jed, Robert, Eric, and Paul were correct in suggesting it was wheel speed sensor related. I did check the sensor outputs and found both front sensors to have only 185 ACmv. The test sheet said it needed to be a minimum of 350 ACmv at one...
2006 Chevrolet Malibu LT 2.2L steering VIN: 1G1ZS51F46
having replaced the intermediate shaft (for noise), the rack gear assm (for internal play), still had car trying to adjust steering wheel to the left. starngely it would do this even at very low speeds in foward and reverse. rotated new front tires from side t...
2007 Chevrolet Impala LS 3.5L Starter VIN: 2G1WB58K67
It's fixed. Found that at sometime in the past a rodent had chewed on some wires on main harness along LH frame rail which was causing all the problems. Many thanks to all who replied especially those who said to chase the communication problem first. Tough to...
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