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Prev Professional Automotive Repair Technical Discussions for September 30, 2010
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Open Help Requests for GM
Help Request Answers
1995 Buick Regal Gran Sport 3.8L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 2GYWB12L4S
Hello to all and any that may help. Well, so far the best results I've had was with the 1st Crank sensor, vehicle drove 25 miles before resetting code and running badly, Trouble codes: P1361 (Ignition toggle error)
1988 Cadillac DeVille 4.5L open 3-4 gear circuit VIN: 1G6CD5153J
on of our customers purchased this 1988 cadillac deville from a private party. she brought it to us so we can inspect it. after she already bought it, go figure! anyways, the car looks very well kept and has a newer 4.5L ACdelco remanufactured engine.the trans...
2001 Cadillac DeVille 4.6L Steering VIN: 1G6KD54481
Car came to me with a leak in the power steering and it was the pump. So i put a new one on and the pump was bad, so i replaced it with another at no charge,well that one leaked also so i put on a third but now i am having a problem with it steering, the car w...
1995 Chevrolet S10 4.3L abs VIN: 1GNCT18W1S
abs warning comes on when driving over 20 mph
1997 Chevrolet P30 7.4L Excessive Emissions VIN: 1GBLP37J4V
Towed in customer thought head gasket problem. Smoke out tail pipe was black. Inspected and found a spark plug wire melted. Replaced plugs and wires. Autolite double platnium. Engine still ran rich and from o2 readings and pulling plugs only on bank 2. This is... Trouble codes: P0121
2000 Chevrolet Silverado 1500 LS 5.3L No Start VIN: 1GCHNHF3J3
I know were supposed to diganose to are fullest extent but im very busy this week, fuel pump wont kick on right away when ignition is turned on if you turn it off then back on twice it will kick on, or turn it on and leave it on it will evenetully turn on, thi...
2005 Chevrolet Uplander 3.5L charging system only works part of the time VIN: 1GNDX33L55
vehile will start and charge for a minute and then the voltage will start dropping. When it works the voltage will be 14.8 one time and as low as 13.7 another
2006 Chevrolet HHR LS 2.2L Abs,Air Bag, VIN: 3GNDA13D36
I normally only work on German cars. My friend took an HHR that he bought running and driven to the detail shop from the auction. Check engine light was off. Some how the detail shop shorted the power wire to the cig. light to its ground. I removed the dash an...
2005 GMC Sierra 2500 HD 6.0L air bag system VIN: 1GTHK24U95
thanks in advance for any help provided on this truck.we are a subaru shop.this truck was just bought for shop use.air bag service light is on.modis is providing a code bo103-electronic frt end sensor 2 circuit fault.i do not have access to a wiring diagram fo...
1991 Pontiac Firebird 3.1L Hesitation, Cuts out, Stall, Misfire VIN: 1G2FS23T8M
Looking for any help
2000 Pontiac Grand Am GT 3.4L Hesitation, Cuts out, Stall VIN: 4G34HR5573
I need to remember to right down VIN's when I open these from home. Sister's car here so it don't pay well, it has a problem of rough or unstable idle. Upon acceleration it stumbles and sometimes dies with hard restart. It died a couple weeks back with fuel ty... Trouble codes: P0341
2001 Pontiac Aztek 3.4L Cruise Control VIN: 3G7DA03E71
Hello, Car came in with no cruise control complaint. Scaned PCM and found LF Wheel speed sensor failure. Replaced speed sensor, verfied new sensor ok, still no cruise. Began further diagnostics from mitchell checking power and ground controls at cruise module...
2002 Saturn Vue 3.0L programming VIN: 5GZCZ63BX2
I am trying to set up this new BCM for another shop. I have a TECH2 and am using it "pass-through" (i.e. I am connected to the PC and the vehicle. When it starts to load the programming it fails at about 512 bytes of the 46,000 it says there is to go. Battery ...

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Custom 3.8L no VIN: 1G4HP5216S
Thanks to all who responded. Thanks to Brian from Ohio for still having note on job he had just done. Making note in shop manual just in case I am lucky enough to get anouther one. Richard [...]
1996 Cadillac Seville STS 4.6L antitheft VIN: 1G6KY5294T
Thank you guys for your help, the problem was on the key, it was deffective why? it was an aftermarket copy and I guess was just no making a good contact at ignition key or the chip on the key was out of spec, anyway the key man came to the shop cut a new key ...
1999 Cadillac Escalade 5.7L Misfire, MIL Lamp on VIN: 1GYEK13R1X
recieved 13 replies to this post,Alex from Georgia was a big help.an internal GM post #pip3081 identified problem.i had noticed that missfiring cyls.were always center cylinders,this post indicates that problem is caused by sticking valves.the post suggests th... Trouble codes: P0300.
2006 Cadillac CTS 3.6L wiper washers VIN: 1G6DPS7756
yes this vehicle is fixed , thank you for the help everyone , it was the wiper module...i didnt know the circuit went through it for washer mode...ordered up a new one from gm, installed and finally fixed...
1991 Chevrolet C1500 Cheyenne 4.3L Stall VIN: 1GCEK14Z6M
Thanks to all that replied. It was the distributor. It was replaces a few years ago and I saw no cracks in the magnet but when I removed it the magnet was very weak compared to the new one. I scoped the neg(rpm) side of the coil and at idle with iac at 15 coun...
1998 Chevrolet K1500 Suburban 5.7L shudder VIN: 3GNFK16R8W
a code po304 was set on one of my road tests so i removed rockers and Performed leak down test on #4 cylinder and noted leakage from exhaust valve. tapped the valve with a hammer and it sealed. spoke to my machine shop and turns out chevy is having problems wi... Trouble codes: P0300.
1999 Chevrolet Express 3500 LS 5.7L will not accelerate VIN: 1GAHG39R1X
we checked for fuel pressure and it had 65psi but no volume. well after talking to the previous shop that worked on the van we found out they had just installed a new delco fuel pump. we went to check fuel pump install and found that the wiring was pinched agi...
2000 Chevrolet Blazer Trailblazer 4.3L Transfer case into Low VIN: 1GNDT13W5Y
The problem was the TCCM in the pass kick panel, the green monster had a playground in the module. Replaced module with a used one. $500, $1000 new. Switch worked properly after install, cleared codes and road test no fault occured. Thanks for the help
2001 Chevrolet Silverado 3500 6.6L No Start VIN: 1GBJK39111
I have not fixed this yet, and am still working on it. Closing help request due to deadline. I will post a fix when finished. After truck is driven, it has a long crank, when it starts, within 10 seconds it sets the p0094. It only happens when warm, starts O.K... Trouble codes: P0094 (Small fuel leak).
2003 Chevrolet Monte Carlo LS 3.4L No Start VIN: 2G1WW12E03
7x crank sensor wire was grounding under the load of the starter so it was taking off line the cam sensor signal and the crank sensor signal,once we found the bad wire under the fuel line bracket the engine started and run like new. thank you to everybody that...
2006 Chevrolet Silverado 2500 HD LS 6.0L MIL Lamp on, reduced engine power VIN: 1GCHK24U56
Well after a few hundred dollars and a ton of time and a few visits to other shops in town and the local GM dealer. I still don't think its fixed. The reduced engine power has not happened in the last 1000 miles except once. The only time it has happened is wh... Trouble codes: P1516, P2108, U0107.
2007 Chevrolet Silverado 1500 LT 4.8L Mechanical VIN: 2GCEK13V57
We replaced both front calipers. So far so good. If this problem still exists & comes back I will update this with all the info. Thanks to all who replied.
2009 Chevrolet Express 3500 6.6L Static spark from engine VIN: 1GB6G3A69A
The Chevrolet dealership basically went on the information we had gathered and installed a Gates tensioner with a metal pulley and Gates belt. Currently, this seems to have corrected the problem. However, still not sure if the fiber pulley on the OEM tensioner...
1989 GMC K3500 Sierra 7.4L no power VIN: 2GTHK39N9L
thanks for all the replies. all data says that the timing connector is a single wire connector behind the distributor, and they are right, but they need to show a picture of where it is located because there is another single wire connector behind the distrib...
1998 Oldsmobile Aurora 4.0L System Overheating VIN: 1G3GR62C8W
You guy's were correct. Head gaskets we finally got a bad gas test. The customer did not want to repair the car so after all of the testing no work. Iguess thats how it goes. Thanks for all the responses. Mike
2003 Oldsmobile Alero GL 2.2L Cranks, No Start VIN: 1G3NK52F03
Thank you so much for everyone's input! Sorry for the delay response. Monitored the voltage at ignition mod fuse. Had 12 volts KOEO. Also, at ignition mod fuse. Had 12volts. Checked crank position sensor for resistance. Specs was 800-1200 resistance. Crank sen...
2003 Oldsmobile Silhouette GLS 3.4L Cuts out, Stall VIN: 1GHDX13E33
Thanks to all that replied, it was the crank shaft wire harness, it was melted to the rear exhaust manifold egr tube, new harness car runs great, thanks again. Mel.
2002 Pontiac Bonneville SSEi 3.8L Vtd VIN: 1G2HZ54152
Thanks for all the replies. I was able to fix this vehicle with the help of the Tech 2 (go figure). The first step after connecting the Tech 2 was to do a module status test and immediately noticed I was missing several modules including the ECM, EBCM, and o...
2005 Pontiac G6 3.5L No Start VIN: 12T3645738
found soon as I touched conector on body module all came to life . After resecuring and repeted retries all seems well
2002 Saturn Vue 3.0L Heated Seat VIN: 5GZCZ63404
A sincere thank you to everyone who replied on this subject. We did find the seat-back portion of the heater element on the drivers side was indeed faulty, and they do run in series as mentioned. Got the parts, slapped them in, and away they go. Thanks again, ...
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