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Prev Professional Automotive Repair Technical Discussions for May 9, 2011
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Open Help Requests for GM
Help Request Answers
1973 Chevrolet Corvette 5.7L Alignment
Looking for some tire help GR70-15 are on this vette What size tires can i put on this and not screw with speedometer or anything else.
1991 Chevrolet Corvette 5.7L Tach
Hi guys. My first time with this "one owner" Vette. It is very clean and ALL stock. When driving I noticed that the tach seems to read high. You reach redline way too easy and its got a lot more. Idle is also high around 1300 rpm. I'd say it's about twice what...
1995 Chevrolet K1500 Suburban LT 5.7L temprature VIN: 1GNFK16K6S
on first inspection t-stat was stuck open so after replacment a full cooling system flush was done with back flush.heater motor was making a rattle,so this was replaced.vehicle does get to and maintains correct operating temp at ilde and driving.the heater mot...
2004 Chevrolet Impala 3.4L blower motor VIN: 2G1WF52EX4
morning vehicle had catastropic failure of blower motor, shaft shifted offline and melted through squirrel cage, outside plastic melted. there is no evidence of melted wiring. i have new blower motor and resistor assy, but no motor operation. the resistor as...
2004 Chevrolet Silverado 1500 Z71 5.3L 1-2 and 2-3 shifts VIN: 2GCEK19TX4
Truck originally had slipping 2nd and 4th gears when driving hard. I overhauled the transmission with new seals gaskets, clutches, band etc. I installed a Transgo shift kit SK4L60E series L. Also installed a transgo seperator plate, new aluminum 1-2 and forwar...
2006 Chevrolet Cobalt LT 2.2L p0480 / P0481 VIN: 1G1AL55F66
This car originally was blowing the cooling fan 30 amp fuse, so we replaced the cooling fan. Could find nothing wrong with the original fan - except it ran as soon as the engine was turned on. After we cleared the codes and replaced the fuse, it only turns on ... Trouble codes: P0480 (Low Speed Cooling Fan Circuit/Relay fault), P0481 (High Speed Cooling Fan Circuit/Relay fault)
2008 Chevrolet Silverado 3500 HD WT 6.6L Mechanical VIN: 608E162208
Engine stall on customer while driving. Pulled codes with snap on modis, P0101 MAF circut out of range, P0402 excessive egr flow. insapected the maf, had alot of ants by sensor cleaned area, air filter looks good. not sure where to check and whats the paramete...
2004 GMC C5500 Topkick C5C042 6.6L No Start VIN: 1GDE5C1134
our wrecker on the way back to the shop started to ssputter as a gas engine with a missfire would do. once back to the shop it died and hasnt been running since. the code is a p0374 missing engine speed signal. we have replaced the ecm, wiring from ecm to the ... Trouble codes: P0374

Fixes & Summaries for GM
Fix/Summary Answers
1978 Chevrolet Corvette Silver Anniversary Edition 5.7L AC control head
I haven't seen this customer again yet to fix his problem although I have offered because of your help. I will be sure to check the bad mode door/diaphragm aspect as one suggested then replace the switch if needed. What i found most helpful, because of my limi...
1996 Chevrolet C1500 Silverado 5.0L Surge, Cuts out VIN: 1GCEC19M8T
I went to change the dist. Ounce i pulled the cap off i found the tab in the middle of the rotor broken off, so it was just riding on the edge of the pin on the cap. Thanks to everyone for the help.
2007 Chevrolet Cobalt LT 2.2L Misfire, MIL Lamp on, harsh shift VIN: 1G1AL55F77
To all that responded THANKS! I had done a compression test and it was within range. I performed leak down and it is not. #1 65% leakage and #4 0%. Rotated crank and still same readings. The interesting thing is that after the reflash, the car went all weekend... Trouble codes: P0301.
2007 Chevrolet Silverado 2500 HD Classic LS 6.0L trans fluid VIN: 1GCHC24U87
I appreciate the responses and apologize for the delay. This request is what happens when you get lazy. I took both lines off the trans but only removed the upper on the radiator cooler then blew air in the cooler fitting & into the line I removed. I realiz...
2000 Pontiac Grand Prix GT 3.8L Poor Idle Quality, Surge, Cuts out, Stall VIN: 1G2WP52K8Y
Thank you for all of your help. The NAPA MAF's don't work properly. I replaced them with a used OEM style MAF.
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