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Prev Professional Automotive Repair Technical Discussions for September 24, 2010
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille d'Elegance 4.6L instrument cluster VIN: 1G6KE54YOW
the cluster stays on when vehicle is turned off and popping noise comes from speakers,also the window switch lights stay on as well,when the popping noise stops everything shuts off.
1999 Cadillac DeVille 4.6L Headgaskets VIN: 1G6KD54Y7X
I would like some feedback on headgasket torque please. I have been doing caddy headgaskets for over 10 years. Recently I read an article that suggested torquing the heads to 70 ft lbs, instead of using an angle gauge. The article seemed to suggest that the fa...
1997 Chevrolet S10 2.2L 3-4 shift/3-2 shift VIN: 1GCCS1444V
Truck was brought in for A/C repair. Customer mentions( Oh, by the way...) that it loses power @ 50mph. Road test confirmed this; At approx. 50mph (3-4) shift, feels like the brakes are applied. let off the gas and coasts down. At approx 27mph (3-2 shift point...
2003 Chevrolet Silverado 2500 HD 6.0L abs VIN: 1GCHC23114
Hey guys The symptom with the truck is low speed abs activation with no codes. Almost fits TSB #03-05-25-007D to a tee. However after performing all appropriate tests which include checking each front sensor for 350 mv which passed. Also removing both sensors...
2003 Chevrolet Suburban 1500 LT 5.3L No Start VIN: 3GNEC16Z43
Hello is me againg, no start in the mornings sometimes., when it starts ,reduce power message comes on,.then goes away and runs fine for 3 or 4 days, new throttle control module,new fuel pump,computer is been reflash,new throttle actuator.
2007 Chevrolet Malibu LT 3.5L cam advance system VIN: 1G1ZT52N47
p0011 is the code that sets for camshaft positon performance (really cam angle performance problem). the parts that have been replaced are as follows: camshaft actuator (us) camshaft position sensor (dealer) camshaft actuator solenoid (dealer) pcm (dealer) i...
2007 Chevrolet Silverado 3500 HD LT 6.0L rotors VIN: 1GBJC34K07
Vehicle arrived with the ventilation veins in the rear brake rotor on passenger side totally exposed. The disc part of the rotor has broken from it's center. We disconnected everything on both sides and cannot remove the rotors. Even on the side where the roto...
2011 Chevrolet Tahoe 5.3L top speed VIN: 1GNSK4E09B
This vehicle is to be used by an ambulance service in the city. They are interested in regulating the top speed to about 70 MPH. They have too many foot heavy employees. Is there any way to do that with the vehicle electronics? I looked over the menus with my ...
1989 GMC K3500 Sierra 7.4L no power VIN: 2GTHK39N9L
This truck came in with a no strat, no spark. replaced the dist and would fire, but had a vacuum leak on intake manifold and fuel pressure was too low. replaced gaskets and pump and now it idles pretty smooth, but when driving under load truck has now power an...
2007 GMC Sierra 2500 HD Classic SLE 6.0L abs VIN: 1GTHK29K17
i am not the first one to tackle this.this vehicle had a problem befor and the ecbm was chanced and it fixed the problem.the truck came in again the abs light was on c0035 and c0040,left and right wheel speed cicut problem. the left and right hubs where both c...
2000 Pontiac Grand Prix GTP 3.8L Excessive Emissions, No Start, Poor Idle Quality, Cuts out, Stall, MIL Lamp on VIN: 1G2WR5216Y
ECT/IAT read negative 40 on scan tool along with MAP reading negative voltage, and MAF toggled between high and low readings both with and without MAF sensor plugged in. All of this occured KOEO. Car was towed in and runs rich when the problem is occuring alon...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Cadillac Eldorado ETC 4.6L Suspension VIN: 1G6ET1293X
Wow! Once again you guys are the best. Replaced rear shocks---car is fixed. Loads of replies and most folks said to replace the shocks. There were also some good suggestions to check spindle bushings, wheel bearings and even broken springs. In my situatio...
2004 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54Y64
The O2 sensor heater elements all had different resistance values. B1S1 was 14.6 ohms, B2S1 was 8.7 ohms and B1S2 was 9.0 ohms. So just for the hell of it, we ordered new O2 sensors from GM. (The GM sensors are Bosch brand) We installed the three new O2 sensor... Trouble codes: P0135 (p0141-), P0141 (p0155-), P0155 (p0130-), P0130 (p0150-), P0150.
1989 Chevrolet Cavalier 2.0L Cuts out VIN: 1G1JC5115J
Thanks to all the help and direction leading me to the injector. Especially Thomas [...]. I replaced the injector and whalla! Fixed! I never would have guessed it was the injector itself as it would work for 2-3 seconds then cut out. Figured if it work...
1990 Chevrolet S10 4.3L Brake Pedal VIN: 1GTCS14Z7L
We plugged and clamped the brake system in various placed. The pressure loss was in the rear. We were able to bypass the abs dump valve & feed the brake pressure straight from the prop valve into the rear brake line and get a good pedal. The abs valve for this...
1997 Chevrolet Tahoe 5.7L starts off in 3rd VIN: 1GNEK13R5V
The fix was simple enough, I replaced the 3-2 solenoid.The transmission works fine now , Knock sensor code wont go away, even after replacing the knock sensor.This thing is driving me up the wall.At least the transmission works!
2000 Chevrolet Express 1500 4.3L MIL Lamp on VIN: 1GBFG15W6Y
this van is fixed. thank you andrew and john. you guys confirmed what i thought in the first place. it just took this long to get a tech2 to do a vin check. the computer was from a blazer. new comp and reprogram and all is GREAT!!! thanx for all the input from... Trouble codes: P0171, P0174, P0174, P0410, P0420.
2004 Chevrolet Colorado LS 3.5L Brakes VIN: 1GCDS13684
One again iATN is the best, backwards calipers, thank you for ALL the replies!
2004 Chevrolet Malibu LS 3.5L MIL Lamp on VIN: 1G1ZT628X4
I got some replies that hit it right on the head. I put a new egr on and looked in the port that goes in to the plentum behind the throttle body and found that the port was clean looking, But I didn't take the throttle body off and was'nt able to see that the ... Trouble codes: P0401 (EGR insufficiant flow).
2006 Chevrolet Uplander LS 3.5L Cables VIN: 1GNDV33L56
I hate to close a post this way. I had to send this van to the dealer for repair. I was on my third power door assembly and still couldnt get the thing fixed. The dealer tech even called me on the phone to help me before i sent it there. Thanks for the help an...
2007 Chevrolet Suburban 1500 LT 5.3L remote and tpms VIN: 3GNFK16337
I fixed it but not sure what did,installed new remote control module and could not program using tech 2 somehow. I ended up flashing bcm and no luck,update was available. Could not get it to work. End up installed old remote control module and everything wo...
2007 Chevrolet Malibu LS 2.2L Dashboard VIN: 1G12S58F57
Well I wish I could take credit for fixing this one, but I can't. The day after I posted this one, it didn't want to start without cycling the key repeatedly. I had a couple of replies that said the ignition switch could be the cause of the original problem...
2008 Chevrolet Impala SS 5.3L Surge VIN: 2G1WD58C08
Good morning. This vehicle is not fixed yet simply because this customer is a traveling salesperson and had to have the vehicle to go out of town. We cleaned the injectors and the maf sensor carefully with no change. When the salesman comes back our way (sh...
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