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Prev Professional Automotive Repair Technical Discussions for October 5, 2012
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Open Help Requests for GM
Help Request Answers
2005 Buick Allure CX 3.8L abs VIN: 264WE53205
hi all tecnitians,i have this buick with brakes problem,pedal is too hard,this is like when you press the pedal became very hard and i change the booster,and steel the same,i bleed all brakes,a check vaccum,is good.i check also master is good.i will apreciate ...
2003 Chevrolet Venture LS 3.4L rear air ride VIN: 1GNDV03E73
Thanks for the help. the air pump runs and pumps up the shocks but the auto air ride dont work. I belive it to be the air hight sensor but am not sure how to test it. Can any one help
2003 Chevrolet Impala LS 3.8L Stall VIN: 2G1WH52K83
Vehicle starts good cold or hot if restarted right away. Problem occurs on a restart after a hot soak. Starts normally, then dies. Usually starts and runs ok on next try. Idles at about 1000rpm, drops to 550 in a second or two. Will stay running if giving some...
2006 Chevrolet Impala LS 3.5L No Start VIN: 2G1WB58K46
This vehicle came in as a no start. Upon further examination, we found that when the key is put in the run position, only the check engine light illuminates. After a few seconds the rest of the warning indicators and odometer finally illuminate too. When you t... Trouble codes: U0140
2006 Chevrolet Cobalt SS 2.4L MIL Lamp on VIN: 1G1AM58B26
With an 18% TPS reading at idle (750) and a P0121 code I replaced the Throttle Body with TPS. The new TPS reads 8% at idle but the idle runs up between 1800 and 2700 RPM by itself. After clearing code the P0121 is gone but a new P0507 code is set for Too High ... Trouble codes: P0121 (TPS Sensor), P0507 (Idle Too High)
2006 Chevrolet Trailblazer LT 4.2L Poor Idle Quality, Stall, MIL Lamp on
The truck came into the shop with a rod knocking I never was able to drive the truck before the repairs were done .I rebuilt the motor install a new crank # 5 piston and rod when cleaning the motor i found the cam phaser stuck and the solinode filled full of m...
1997 GMC K2500 Sierra SL 5.7L Surge, Cuts out, Misfire, Poor Fuel Economy VIN: 1GTGK24R6V
It has p1345 cam/crank correlation code but the distributor is non adjustable. The ones I have done previously have had adjustable distributors & you just go through the process with the scan tool. This one is -27 degrees with the distributor one way. We remov... Trouble codes: P1345
2008 Other GM Commodore 3.6L MIL Lamp on VIN: 6G1EL55788
This car uses a 3.6 GM V6 similar to engine used by GM in US. Car is very clean. Runs smoth and there is no driveability concerns at all. Before or after setting code. But, about every week after cleaning memory fault, will set code P0101 again. Togheter to ... Trouble codes: P0101 (MAF circuit range / performance)

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick LeSabre Custom 3.8L Surge VIN: 1G4HP54K3Y
After numerous tests I determined that it was a problem with the transmission. I went to my local transmission shop I use for tranny work and they think it is in the transmission also. The customer was going to drop it off at the transmission shop but the prob...
1989 Cadillac DeVille 4.5L Abs
Thank you all that replied and especially Juan as we did not know exactly how this system worked and information was very hard to find. The accumulator fixed the problem a new one not the used. as soon as the new one was installed it pumped right up all the l...
2000 Cadillac Seville SLS 4.6L Stall, MIL Lamp on VIN: 1G6KS54Y7Y
First thanks to all who replied,the reason I thought this was confusing was because alldata says that there suppose to be 10 volts at the plug, not line voltage. So I was wandering what droped the voltage if the test is with the plug off the sensor. I found th... Trouble codes: P0102.
1998 Chevrolet K1500 Cheyenne 5.7L Misfire VIN: 2GCEK19RXW
Thanks for the replies, i checked the distributor and distributor drive gear, the coil was a new delco. We decided to remove the heads and the customer wanted to install a long block with a buddy. Wish I could have torn it down and seen how it looked. Thank... Trouble codes: P0300, P1345 (Crankshaft position / camshaft position correlation).
2001 Chevrolet Impala LS 3.8L Cooling fans VIN: 2G1WH55K11
First off thank you to all that offered help. I replaced the BCM and all fan operation has been restored. I never could find where the BCM would control the fan controls but it does.
2008 Chevrolet Aveo LS 1.6L MIL Lamp on VIN: KL1TD56658
Hey guys thanks for the tips, we ended up replacing the cam sensor and performing a relearn, all checks ok now. Also checked for sludge and none was found. Trouble codes: P0016 (CKP-CMP Correlation), P0340 (Camshaft Position Sensor Problem).
2008 Chevrolet HHR LT 2.2L engine timing VIN: 3GNCA23D18
Hey guys, thanks for the help! Here's what I found and a little back story on this vehicle. The customer had been driving this thing with a rattling timing chain (busted guides) and a p0016 code, evidently the cam timing took a walk and the timing was out of f...
2001 Saturn SC2 1.9L Poor Idle Quality, Stall, MIL Lamp on VIN: 1G8ZY12761
Thank you, gentlemen, for your prompt help! This car is finally fixed and returned to its owner. Scott and Charles directed my attention to the IAC motor and its wiring. I checked for continuity between the 4-pin IAC connector and the PCM connector, pins 42... Trouble codes: P1599 (Engine Stall or Near Stall Detected), P0506 (Idle Speed Low), P0507 (Idle Speed High), P0509 (Idle Control System Circuit High), P0107 (MAP Sensor Circuit Low Voltage), P0706 (Transmission Range Switch Performance).
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