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Prev Professional Automotive Repair Technical Discussions for December 8, 2006
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L No Start, Stall
I got this car last week, came in with a stall hot cosern. So i varified the problem, it did indeed stall after 15 mins, checked for codes non present. So tried to start starts right back up, stalls 2 mins later, starts right back up. Then it wouldnt stall, ra...
1996 Buick LeSabre Limited 3.8L Poor Idle Quality VIN: 1G4HR52K4T
Hello, This is a first time post for me. Customer compliant is high idle. The idle will be about 1500 to 2000 rpm and will climb higher at times. when unplugging TPS sensor the idle returns to normal. There are no codes present and noticed on scan tool that wh...
1991 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Stall, Poor Fuel Economy
we are at a loss on this one, vehicle came in running poorly. and for once when we started to work on it it won't even start, long story short-we have injection pulse and spark. when you crank vehicle it dumps fuel in closed throttle position, when you open it...
1995 Chevrolet S10 2.2L Poor Idle Quality
Hi all !!! I have a 95 S-10, 2.2L, when it starts cold, it runs and idles good, but when it warms up it will idle erratic and wants to stall. The customer has had prior work done on this truck somewhere else. They have changed the Temp. sensor, TPS, Crank sens... Trouble codes: 41 (1 x signal error)
1997 Chevrolet K3500 Cheyenne 7.4L hard start VIN: 1GCHK39J1V
hi guys i have two 1997 k3500 chevy duallies with the same problems. the problem is starting hard after warm. at cold start say in the morning both trucks start right up like brand new, but after that all day they have extended cracking before starting. acting...
1998 Chevrolet Venture 3.4L Unknown VIN: 1GNDX03EWD
customer came in with a noise on moderate acceleration it sounds like the exhaust pipe is hitting something or that it has a metal bracket loose at the back of the engine. we can get the vehicle to make the noise by torqueing the engine in drive but not in rev...
1999 Chevrolet Silverado 1500 5.3L cooling/engine VIN: 2GCEK19T7X
Brought truck in complaining of a coolant leak and check engine light on. Pressure checked the system, and found no external leaks. One thing I noticed, if you shut the truck off for a few minutes, and fire it back up, the misfiring monitor starts showing all ...
1999 Chevrolet K1500 Suburban 5.7L Surge VIN: 3GNFK16R0X
This is the boss'es wife's car. She complained about a month ago that it had a surge at idle itermittently. I test drove it but could not reproduce problem. now she says it will "take off" from a stop without touching the gas pedal and go fast enough to shift ...
1999 Chevrolet Camaro 3.8L Poor Idle Quality, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 2G1FP22K3X
Came in with check engine lite. # 3 misfire, O2 rich. At first no communication with scanner and ECM . Found a blown fuse for ECM. Scan and ECM communicate. After clearing codes the rich O2 never returned, but now I have a random misfire then settles into # 3 ... Trouble codes: P0300 (3 misfire), P0303 (random misfire-intermitten)
2000 Chevrolet Blazer LS 4.3L Temp VIN: 1GNDT13W0Y
Hi All, i was not sure which catergory to put this under so if it is not right sorry. This Blazer came in with a low/ no heat condition. I found the intake and radiator both leaking coolant. So I put a new gasket on with a new thermostat, and replaced the radi...
2003 Chevrolet Trailblazer North Face 4.2L Mechanical VIN: 1GNDT13S73
Hey all you gm guys. Anyone have any ideas on this one? The blend (Floor, panel and defrost ect) does not operate 100%. It only blows out a little at the dash vents when at the vent position. It comes out of the floor and the defrost but does not come out much...
2003 Chevrolet Trailblazer North Face 4.2L MIL Lamp on VIN: 1GNET16S23
This Trailblazer has a reoccuring P0172 code. STFT & LTFT always more negative than positive. Fuel trim index fluctuates between -9 & -17 but I have never seen it as low as -35 which is what it takes to flag P0172. Even looking at freeze data it will not catch... Trouble codes: P0172 (Rich condition)
2000 Oldsmobile Intrigue GX 3.5L Cooling Systems VIN: 1G3WH52H7Y
This car is overheating when the heater is on. We have done all the above repairs. When we bypass heater core and flow tested heater core it appears to be ok. While bypassed, the car doesn't overheat. When hooked up, it appears to be a flow problem throught th...
1993 Pontiac Grand Am SE 3.3L ebgine oil VIN: 1G2NE15M9S
Hello men, Customer states having to add a quart every two weeks, ~3-[...] per interval. Leaks at front and rear of intake like all 3.1s. Pulled plugs, found slight browning at ends of plugs. How can I determine where the oil is going? At start ther is no s...

Fixes & Summaries for GM
Fix/Summary Answers
2002 Buick Rendezvous CX 3.4L hvac VIN: 3G5DA03E72
This one is fixed, thanks to a couple of you guys who suggested there was a tsb on taking a cable tie and holding one of the doors out of the way. Pretty simple fix really.
1993 Chevrolet Cavalier RS 2.2L compressor VIN: 1G1JC544XP
I appreciate all the suggestions that I received. Hate to admit the obvious that I left the bolts loose. I'm glad that at my age of 69 I only work on my own car if I worked on the customers vehicle we would be very busy Redoing everything that I do or the cust...
1996 Chevrolet C1500 5.0L Misfire VIN: 1GCEC14MXT
Well most of the replies were on target and if I was going to reply to my request I would have said the same thing the problem was before I asked for help I used two cans of carb cleaner looking for the intake vacuum leak externally the real problem was the va... Trouble codes: P0305 (misfire 5 cylinder).
1999 Chevrolet Monte Carlo LS 3.1L Hesitation, Surge, Cuts out, MIL Lamp on VIN: 2G1WW12M0X
I would like to thank everyone first for the help. It turns out after further testing that the aftermarket crank sensor was defective. Also the PCM was damaged when the B+ wire from the PCM to the CKP sensor shorted out against the a/c accumulator. Replaced th... Trouble codes: P0336.
2002 Chevrolet Tahoe LS 5.3L abs VIN: 1GNEK13Z12
Thanks for all your help. I tested sensors with scanner and they all seem to work ok . Back probed sensors all seem to work ok. When customer comes back in i will suggest that we change the sensor and bearing assembly. Thanks again for all your help.
2003 Chevrolet Express 3500 6.0L high idle VIN: 1GDJG31U13
Well after much head scratching on this one, I was able to get the idle corrected. After obtaining the rest of my missing information thanks to you guys, I was able to reset the fuel trim via the scanner, run the idle relearn by driving the van, after two time... Trouble codes: P0507 (rpm idle high).
1999 GMC Sierra 2500 SL 5.3L Cuts out, Stall VIN: 1GTFC24T7X
Tech suggestions were to check vss sensor on scanner, also check egr problems sticking and possible pressure regulator.
2000 GMC C6500 7.4L MIL Lamp on VIN: 1GDJ7H1D3Y
I fixed this truck the first time, but ignorance prevented me from sealing the deal. Lacking proper scan equipment, training and pin charts for this truck, my customer (moving truck rental business) opted to call in an HD GM specialist. He came out, said my ... Trouble codes: P1120 (TPS 1 less or greater than calibrated value), P1221.
2003 GMC Envoy XL SLE 4.2L motor VIN: 1GKES16573
I took the trans mount off and there was one small stone in it I told my self there is no way this is going to fix this car so i put it back together and it was fixed thank u brett
1998 Pontiac Trans Sport 3.4L powertrain VIN: 1GMDX03EOW
I was able to determine that this noise is normal for this model and that the vehicle owner was over exagerating. Thank you for the replies.
1999 Pontiac Grand Prix GT 3.8L Trac light alway on VIN: 1G2WP52K8X
Well folks, I had to send this one out without a fix so far. Here's a quick summary of what I found. I decided to track and test each and every wire out of the traction control/abs module [BTCM] and came across a major roadblock in my diagnosis. My Mitchell wi...
1999 Pontiac Bonneville SE 3.8L tcc lockup VIN: 1G2HX52K2X
Most of the replies were correct, this tranny has a problem with the bearing failing in the drive sprocket, and it chews up the inside of the sleeve thru the valve body plate. Not a good design, but with a handfull of new parts, it is back in action. Thanks to...
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