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Prev Professional Automotive Repair Technical Discussions for September 9, 2010
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Open Help Requests for GM
Help Request Answers
1997 Buick Riviera 3.8L Stall VIN: 1G4GD2215V
driving down the road it stalls. it wont stall sitting at an idle. There is no normal conditions i can duplicate to make it stall. Once stalled pull over and it will start almost rite back up.
1997 Cadillac DeVille 4.6L Engine VIN: 1G6KS52Y3V
Hi. We bought a 97 cad deville, 101k mls. This car had bad head gskts. We took of the heads for machining, and valve check. After putting heads back on, we found the head bolts would not tighten.. We bought the head bolt kit to re-tap and insert the head bolt ...
1984 Chevrolet Corvette 5.7L Odometer VIN: 1G1AY0788E
Hi, this has been a very tough one for me, everything works on the cluster but the odometer. We have speedometer and getting signal from speedsensor. Installed different dash from place that repairs dash but no change what did i miss. Thanks john
1993 Chevrolet Blazer Silverado 5.7L door locks VIN: 1GNEK18K4P
problem with both door locks not wanting to unlock. they will both lock fine when pressing switch but both doors will not unlock with button. pressing passenger lock/unlock button has same problem. i can actuate driver side actuator with my power probe and it ...
1994 Chevrolet K1500 Silverado 5.7L Hard starting VIN: 2GCEK19K4R
This 94 chevy 4x4 silverado came in with hard starting compliant. Owner compliant confirmed. I drove veicle for about 15 to 20 mins. When I tried to start engine. it took a while for it to start, when it did start lots of black smoke from exhaust pipe and smel...
1997 Chevrolet Astro 4.3L drain VIN: 1GERRH4567
Vehicle has a 500 ma drain, pulls battery down in 3 days. Every fuse and relay possible has been removed to try to define problem. Dash panels have been removed and pulled all connectors; Starter has been dis-connected to take alternator out of system. I have ...
1998 Chevrolet C2500 Silverado 5.7L 6,8,5,7 cylinders VIN: 1GCGC24RWE
vehicle is missing on both rear cylinders on both sides of the engine. cylinders 5-7 6-8 are dead. we have fuel compression and spark is good. rear half of engine not working. im thinking we have a crack in the lower intake ???
2002 Chevrolet Trailblazer LS 4.2L shift points VIN: 1GNDT13S82
Ok guys this Trailblazer came in with a late shift problem. I do not do much trans diagnostics and need some help. It does not shift into 2nd gear untill about 20-25mph, and then does not go into 3rd until 40-45mph. The computer does not command the shifts unt...
2002 Chevrolet Impala LS 3.8L MIL Lamp on VIN: 2G1WH55K72
anybody know of a special tool to remove the knock sensor between the engine and the trans ? a deep socket is too long a shallow socket is too short, it has to be a thinwall semideep please help if you have done this sensor and any advice on how to get it out ... Trouble codes: P0332
2003 Chevrolet Trailblazer LT 4.2L Crankcase VIN: 1GNES16S63
Thanks in advance. Got caught with my pants down on this one. Vehicle comes in with a overheat complaint. Found oil and coolant contamination and coolant loss. I ASSUMED, headgasket. Broke every head bolt on the way out(didn't rap hard enough). removed head ...
2003 Chevrolet Monte Carlo SS 3.8L Starting VIN: 2G1W15K539
well after informing the customer that he waited to lated to do the intake with a fel pro problem solever gasket second version (metal over layed with rubber) it started tapping he said he would worry about it when it died (he is a college student) well the e...
2004 Chevrolet Silverado 1500 LS 4.8L Abs Module VIN: 2GCEK19V24
Need help with codes c0265 and c0269 replaced r/f senser that code went away truck pulls to left and feels like abs grabbing at low speeds
2007 Chevrolet Suburban 1500 LT 5.3L remote and tpms VIN: 3GNFK16337
I have this 2007 suburban with tpms light on dash and remote entry not working. Check all fuse good got a whole buch u and b code U0214 B0121 U0155 U0140 ETC AND SO ON My question is who the responsable module control remote and tpms. Lead way where to start ...
2008 Chevrolet Express 3500 6.0L No Crank VIN: 1GBJK34K98
Thank you to all the hard working Tech's who have a idea on this one. Customer complains of batteries must be recharged to get it started after sitting over 12 hours in cold weather. Then he was out pulling trees out of the woods and within a mile of a hard pu...
1998 GMC Sonoma SL 2.2L MIL Lamp on VIN: 1GTCS1444W
This is my own gopher truck. It has been running perfect prior to the sudden ECM failure. After replacing the ECM I had to do a relearn for the security system before I could get the truck started, OK, now I get the P1336 code. Tried doing the CKP relearn proc... Trouble codes: P1336 (CKP relearn not done)
2000 GMC Savana 3500 5.7L Brake Lights VIN: 1GTHG39R1Y
This van has a problem w/ the brake lights. The Top mount light works fine. Hazards work fine. Each housing has 2 3157 bulbs, (double filament) When I use the hazards the upper bulbs flash bright. When braking the lower dim lights come on, not the upper bright...
2008 GMC Acadia SLT 3.6L Hvac System VIN: 1GKER13788
This one came into me in august, service drive managers wife's truck. Seems to blow warm at times. Looks like they have replaced the exspansion valve already. I tested it yesterday morning and found the outlet temp from center vents to be about 55 degress, out...
2000 Pontiac Firebird Trans Am 5.7L Wipers VIN: 2G2FV22G6Y
When is dry outside and wipers are not turned on, they do not come on by themselves, since I am leaning toward the circuit board I wanted that out of the way, when is raining and turn wipers on to intermittent will wipe ok for a bit and then will go to low spe...
2003 Saturn L300 3.0L Hesitation, Surge, Stall, Misfire VIN: 1G8JW54R03
Runs rich at idle. Lean anything off idle. Does not want to accel over 1200 rpms on it's own. Saturn (3 negative electrode) plugs have been replaced and new saturn (single electrode) have been installed. Runs the same. Not sure which ones are the correct plugs...

Fixes & Summaries for GM
Fix/Summary Answers
2004 Cadillac Escalade 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GYEK63N74
Well sorry it took so long to respond but was waiting to make sure was fixed. I removed the intake and found that #2 cylinder was not sealing on gasket part of gasket was gone, also replaced left side converter due to not performing was mimicing pre o2 sensor.... Trouble codes: P0300, P0420.
1991 Chevrolet S10 4.3L Speedometer VIN: 1GCCS19Z3M
Well, not as many replies on this one as I expected, but they were helpful. We went ahead and checked and cleaned all grounds on vehicle. So far so good with speedo. We'll call it a fix. Thanks again.
2004 Chevrolet Impala SS 3.8L No Start VIN: 2G1WP551X4
found wires melted together in engine harness-short to signal voltage,Mitchell 1 wiring diagrams were not very accurate to say the least.also had bad BCM .thanks for all replies
2005 Chevrolet Silverado 2500 HD LS 6.6L crank/cam VIN: 1GCHK29275
Hi all. After confirming that I did have good sensors, signals, ect. I pulled the Cam and Crank sensors to see where the notches were in relation to the sensors. They were not lined up properly so off came the fron cover again (its amazing how fast you can d...
2006 Chevrolet Colorado WT 2.8L MIL Lamp on VIN: 1GCCS14866
Thanks for all the help...Tried numerous thing...finally sent to the dealer...they redid somethings we did...to no avail...determined it was the timming chain ( don't agree)...The cust decided to sell the vehicle with no repair...Expensive lession... Thanks e... Trouble codes: P0017.
2007 Chevrolet Silverado 1500 LS 4.8L MIL Lamp on, harsh shift VIN: 1GCEK14X47
customer has not returned for further diagnosis on this truck. thankyou to everyone that replied. I suspect that theres an issue with the ebcm but i am not able to check further.
1998 GMC K1500 Sierra SL 5.7L No Start, Stall VIN: 1GTEK19RXW
We check the resistance of the crank sensor, two of the 3 pins when checked were open. We replaced the sensor with a new one and its been running good for a while now. Thanks to all that helped.
2005 Pontiac Sunfire 2.2L friction disk VIN: 3G2JB52FX5
Hi there, we have double checked the clutch application - was ok, and the aftermarket company has sent us a replacement clutch kit under warranty. we have replaced the clutch and road tested the vehicle - seems to feel and drive very good, suspecting a bad bat...
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