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Prev Professional Automotive Repair Technical Discussions for March 3, 2009
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Cadillac Catera 3.0L drivers side heat VIN: W06VR52R1W
I'm out of my element on this one. One of my fellow techs here got a good deal on a catera, but the flow control valve was leaking. He replaced the valve and then discovered that the heat worked fine on the passengers side, but on the drivers side he gets cold...
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2004 Cadillac CTS 3.6L Engine VIN: 1G6DM57774
Have a problem advising my customer on this one and need advice. Verified camshaft sprokets have missing teeth, and engine has obviously jumped timing. Do these engines bend valves? I am inclined to think so, I just don't want to assume or tear into further an...
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1992 Chevrolet Lumina 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: NXC13875HK
Ok, This vehicle is given me a head ache. This car came in a bit ago with fuel pooring out of the throttle body. We thought it was the fuel pressure regulator. That was replaced and a tune-up, along with a throttle body clean. the car left and came back 4 week...
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1996 Chevrolet S10 LS 2.2L Poor Idle Quality VIN: 1GCCS194XT
this rig came in to me with an overheated motor, replaced with known good engine assembly, now has severe pinging problem on acceleration, light or heavy throttle, no history on vehicle,watching data stream, knock sensor within specs,pcm is retarding timing 5 ...
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2003 Chevrolet Silverado 3500 6.6L Battery VIN: 1GCJK39113
Cust. has replaced the batterys several times. He states that the batterys will go dead in about hour an half. We have tested it at idle, and the output of the alt. is 30 amp and the volts are 15. The system has a major draw. I have put an amp meter on the dri...
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1995 Geo Prizm LSi 1.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1Y1SK5284S
this geo is killing me. after get car to act up put red brick on it and things got crazy. sometimes readings fine other times rpm over 7000,tps @125%, speed @138 All while inthe bay in park, then would suddenly have no comm with scanner, then back to normal. a...
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2003 GMC Sierra 2500 HD SLE 6.6L No Start, Stall VIN: 1GTHK29183
Truck came in on a hook a couple months ago. Cust. claimed no start. When we took the truck off the flatbed it started right up. We ran our tests and found no codes, plenty of fuel pressure, glow plugs fine, fuel filter clean, no problems at all. A week or two...
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2004 GMC Sierra 3500 SLE 6.6L Hesitation, Surge VIN: 1GTJK33254
This truck came in and it bucked on accel. After sitting all night it ran fine.I believe it is a fuel issue and at one moment I thought I saw fuel pressure drop off on the modis. Any help on this would be helpful as I am not a diesel tech. I changed fuel filt... Trouble codes: P1093 (fuel pressure low during power enrichment current code), P1093 (fuel pressure low during power enrichment current code), P0045 (Boost control solinoid circuit in history code), P1621 (PCM eprom memory performance in history code)
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1990 Pontiac Firebird 5.0L No Start
This is an engine,computer and harness swap.The problem i am having is that when i got the engine and computer i did not get the pass key decoder module.Does any one know how to fool the computer to enable fuel and start without the module?what is the computer...
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1999 Pontiac Grand Am SE 2.4L Misfire VIN: 1G2NE52TXX
Trying to be as efficant with customers money as possible. timing chain, broken valve spring worn cam lobe all possible? Trouble codes: P0300, P00, 300 (Plugs 12 are dark swapped with known good plugs ran same story)
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2002 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WK52J42
Customer stated that MIL light is on and steady. Ran diagnostic reader and code of P0420 reported. Would there be anything logical that is causing the CAT to burn up? Is there anything else that I should look at besides the CAT itself? Trouble codes: P0420 (Catalyst efficiency low-bank 1)
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2001 Saturn L200 2.2L No Start VIN: 1G8JU52F31
Thank you in advance for any help. I'm trying to find the fuel pump relay on this vehicle. It's supposed to be in the under hood fuse box. There is a slot for the relay, but no terminals and no wires. We even opened up the fuse box and found no terminals, no c...
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2002 Saturn SL 1.9L clutch VIN: 1G8ZF52892
this clutch was replaced with OE clutch at 90,000km by my shop. The customer has owned the car since new, no kids driving. The car left and everyone was happy... Car shows up again slipping with the clutch engaging at the top of the pedal, removed transmission...
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Blazer 5.7L Oil System VIN: 1GNEK9RJ35
After the oil pump was changed I performed an oil flush and had the customer run the vehicle on the freeway for 50 miles. The oiling problem was solved but squeak was still present. I removed distributor and found the shaft was completely rusted. I replaced th...
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1995 Chevrolet S10 LS 4.3L Heater VIN: 1GCDT19Z8S
Thanks to all who responded. Andy [...] And Timothy from California got it right the a/c cycling switch had shorted internally making the a/c run constantly when defrost was turned on.The wet air would hit the evaporator & freeze eventually closing off air ...
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1999 Chevrolet K1500 Suburban 5.7L Misfire VIN: 3GNFK16R2X
Sorry for the delay on the closing post. I thank everyone who gave me very helpful suggestions, however I have to close the help request with problem not fixed, due to the customer not returning the vehicle for more testing. If the customer do return I will d... Trouble codes: P0306 (missfire on 6 cylinder).
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2000 Chevrolet Suburban 1500 LT 5.3L batterydrain VIN: 3GNEC16T2Y
i checked this vehicle from top to bottom used many of the ideas sent,what i did was pull the fuse for the interior lights since the night crew uses this vehicle i have a feeling that they would leave the lights on inside the vehicle.we will see if it happens ...
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2001 Chevrolet Venture LS 3.4L radiator fans VIN: 1GNDX03EX1
THANK YOU SO MUCH FOR ALL YOUR REPLIES, I ENDED UP TRACING WIRES AND FOUND BROKEN WIRE UNDER THE UNDERHOOD FUSE BOX. THE WIRE BROKE JUST INSIDE AND CURLED UP AND TOUCHED 12 VOLT RED WIRE. THAT IS WHY I HAD 3 POWER WIRES ON THE RELAY INSTEAD OF TWO. IT HAPPEN ...
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2001 Chevrolet Impala 3.4L MIL Lamp on VIN: 2G1WF52E51
Thank you everyone, the car is now fixed. The problem was the intake manifold, a piece of metal was trapped between the EGR Vacuum port and occasionally it blocked the passage of the vacuum. I appreciate your help. Thank you.
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2006 Chevrolet Colorado LT 2.8L tire wear VIN: 1GCDT196X6
well I assume it will be fixed. thanks for all the replys. we are having our alignment shop set the camber to +.50 not the factory spec of -camber we will monitor the vehicles for wear. thanks folks...
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2000 GMC K2500 Sierra SLT 6.5L Cranking on its own VIN: 1GTGK24F3Y
Thanks for all the replies, customer didn't want to spend anymore money, so he took the truck. I'm guessing he'll be back the next time his batteries go dead. When he comes back we'll be putting a starter in it. Thanks again
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2004 GMC Sierra 3500 SLE 6.6L Cuts out, Misfire, MIL Lamp on VIN: 1GTHK33274
Only three replies. One to apply shop air to cylinders and watch for bubbles. Also to check the harness close for short to ground. One stated what all he would replace to fix it, including replacing injector cups which this engine does not have. One had to do... Trouble codes: P0202 (2 Injector circuit- cylinder 2), P2149.
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1995 Oldsmobile Cutlass Supreme SL 3.1L No Start, Misfire VIN: 1G3WH52M2S
thanks to all that replied... When hooking up the plug wires, I went by the numbers on the intake as to which cylinder was which... upon deciding to "try" hooking it up the way the computer print-out was, the thing started, and ran smooth. again, thanks to all...
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1999 Oldsmobile Alero GL 2.4L No Start VIN: 1G3NL52T8X
Thanks for all the replies. After testing, I feel like its a ECM problem. However, I must rule out this possibly being a security related issue even though I don't feel that it is. Since my modis cannot access the BCM, Im sending this one to the dealer to conf... Trouble codes: P0507.
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2002 Pontiac Grand Prix GT 3.8L LF sensor code set VIN: 1G2WP52K32
the problem was in the wire loom. there was a wire almost cut in to from a wreak. it only had a couple strands of wire still connected and it was bare and showed a lot of weather damage. I replaced the loom and so far it's been working great. Thanks for all th...
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2003 Saturn Ion-3 2.2L Hydraulics VIN: 1G8AK52F43
Thanks for all your replies. Currently waiting for owner to acquire some funds & time to bring the vehicle back in. I will be replacing the master cylinder when it comes in. Once that's done I'll repost to let you know how that worked.
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