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Prev Professional Automotive Repair Technical Discussions for October 4, 2012
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Open Help Requests for GM
Help Request Answers
1989 Cadillac DeVille 4.5L Abs
I have this 89 deville that is giving us fits. The customer states that they replaced the entire master cylinder unit on the firewall. They also provided a second unit which we swapped the accumulator from. Everytime you push the pedal down the motor on the bo...
2004 Cadillac Escalade EXT 6.0L Power Loss VIN: 3GYEK62N44
what i have done to try and figuar this one out is this... documented P1516, P2108, and U0107.. CLEARED codes and as soon as i started the truck the engine ran bad and had no throttle responce... code that stored was U0107.. I did check all my powers and groun... Trouble codes: P1516 (Throttle Actuator Control TAC- Position Performance), P2108 (TAC Module Performance), U0107 (Lost Communications with TAC Module)
1992 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Stall VIN: 1GNFK16K1N
Vehicle came in customer's complaint is vehicle idles very low and almost stalling when sudden and hard braking. My technician is able to duplicate symptom, when engine is hot idles drop to almost 0 and wants to stall when hard on brakes (abs light comes on) a... Trouble codes: 33 (Map sensor voltage high)
1999 Chevrolet K1500 Suburban 5.7L 2nd gear VIN: 3GNFK16R0X
Hello there I have this Suburban and I got it from cust with second gear missing. I don't get into fixing transmissions so I took it to a very reputable transmission shop and they looked at it and said second gear band is bad. With that i quoted out a price to...
2003 Chevrolet Trailblazer LTZ 4.2L MIL Lamp on VIN: 1GNDS13S73
Came in for the RUDUCE POWER) got codes P1271A and P1280A. While testing battery went dead. Replaced battery,,, typical five year and its dead syptom. When I replaced battery I noticed that the fan seemed to kick on stronger at start up. Prior to replacing bat... Trouble codes: P1271
2006 Chevrolet Impala LS 3.5L No Start VIN: 2G1WB58K46
This vehicle came in as a no start. Upon further examination, we found that when the key is put in the run position, only the check engine light illuminates. After a few seconds the rest of the warning indicators and odometer finally illuminate too. When you t... Trouble codes: U0140
2008 Chevrolet HHR LT 2.2L engine timing VIN: 3GNCA23D18
OK Chevy folks I really need you input on this. I'm replacing the timing chain on this HHR. According to the book, the intake cam is suppose have the INT mark positioned at 2 o'clock. However when I try to position the sprocket at the 2 o'clock position the in...
2003 Pontiac Grand Am SE 3.4L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G2NF52E63
This fine ride came in with a check engine light, running rough, and stalling. It had a P0300 stored. Data showed missfire counts current to be in the low hundereds on cyl. #3. History misfire on #3 were in the thousands. First thing I did was verify the custo... Trouble codes: P0300 (Engine Misfire detected)
2000 Saturn LS2 3.0L Engine Oil in coolant VIN: 1G8JW52R4Y
Hi everyone, this saturn is just dumping engine oil into coolant, you can watch the coolant rise as engine is run, I am looking at possible causes like head gasket or oil cooler but need advise on which direction to go or if there are common problems with this...
2001 Saturn SC2 1.9L Poor Idle Quality, Stall, MIL Lamp on VIN: 1G8ZY12761
This is a frustrating one. A few weeks ago the customer asked me to come to his house to get his car started. He had changed the EGR valve, EVAP purge valve, and Coolant Temp. Sensor. I cleaned the fouled plugs and got it started. It still didn't idle, but he ... Trouble codes: P1599 (Engine Stall or Near Stall Detected), P0506 (Idle Speed Low), P0507 (Idle Speed High), P0509 (Idle Control System Circuit High), P0107 (MAP Sensor Circuit Low Voltage), P0706 (Transmission Range Switch Performance)

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Tahoe LS 5.7L Misfire, MIL Lamp on VIN: 1GNEK13RXT
thanks everyone for your time i came this morning remove all spark plugs # 5 and #7 was wet with fuel. 96 truck still had oem ignition wires with numbers on it. change spark plugs and wires reset light start run great road tested no more misfire.i guess no ma... Trouble codes: P0300.
1999 Chevrolet Tahoe 5.7L cyl 3 VIN: 3GNEK18R5X
Thank you all very much. Disassembled engine and found nothing out of the ordinary, but lots of carbon in cylinder/s. Nothing in exhaust either. Carbon is my only guess as to what the problem could have been. The customer wants to go with new GM crate engine, ...
2000 GMC Yukon XL 1500 SLE 5.3L buzz or rattle noise VIN: 3GKFK16T8Y
Third FPR was the charm! Just read Gene W's post about "What does it take?" Wanted to let the customer drive it for awhile, and they are happy it's quite again.
2006 GMC Yukon XL 1500 SLT 5.3L Misfire VIN: 3GKFK16Z06
I appreciate all the help. This vehicle has not yet been repaired. All mechanicals have been inspected, no valve train problem exists creating misfire. Upon this vehicles return, a very unusual whistling noise was occurring from the intake manifold area that ... Trouble codes: P0300 (misfire).
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