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  1. The 02-09 "How-To" and DIY Section
    Hello everyone I have a 2002 Chevy trailblazer 4.2 L with 210, 000 miles. This car has been running great without any problems I bought it at 160,000 miles and drive it everyday. I recently came across a Double-Din Bluetooth boss deck and wanted to install it so I didn't have to deal with the...
  2. 02-09 General Tech Q&A
    hello all. i have a 4.2 04 with 143600 on the clock. ive been having an issue where using large power draw such as windows or using heat on full blast or anything that highly draws power very suddenly will cause reduced engine power with code p2138 "Throttle/Pedal Position Sensor/Switch D/E...
  3. 02-09 Vortec 4.2L I-6 Engine and Drivetrain
    I have a 2004 GMC Envoy I purchased not too long ago. Recently, as in 3 or 4 days ago, the REP light has been coming on very often. Has only come on once before and had not been back on since. Until now. Now as soon as I take off it only takes a couple minutes to come on. I made it to the auto...
  4. Introductions
    Hi, I have a 2004 Envoy 4.2L. Starts right up, revs up no problem, soon as its put in gear, the SES and Reduced Engine Power light comes on and car does not rev anymore. I have seen threads on the Reduced Engine Power, but trying to pinpoint exactly if possible. Didn't read anything if the car...
  5. OEM Issues
    TL;DR: All of my coolant leaked rapidly from the system. Refilled with water to test, none leaked out after driving ~5 miles to a safer parking lot. ------ Story: I bought my 2004 Trailblazer LS (4.2L I6) about a month ago. It has 83k miles on it, but I've had some problems ever since. It...
  6. OEM Issues
    hello all new to the forums today! i need your guys help today i changed my air filter, fuel filter oil, filter, spark plugs. and cleaned my throttle body i took it off and moved the plate a lot i held it open with my finger and cleaned all inside now i know that that is bad. i buttoned the car...
  7. Engine Tunes/Mods
    Vehicle: 2003 Envoy XL SLE 4.2L I-6 Mileage: 92,000 Hi everyone - I am desperately looking for help on the rather serious REP issue. Yesterday, for example, REP manifested itself no fewer than 45 times while my girlfriend was driving it. Today, I took the vehicle for my usual 34 mile commute...
  8. OEM Issues
    I have been reading your alls post for the last year and finally joined tv I love this site you all are very informative and I hope one day I can really help you all out as much as you have me I have a 2002 Chevy trailblazer Ltz this is my second one I love tb I bought this one with problems...
  9. OEM Issues
    I have seen a lot of post about my problem but not sure how to pin point problem. I get the reduced engine power light. The engine seems to only go into reduced engine power when the gas is feathered. If I floor it and let off complety the light/engine runs normally, if I am use my cruse...
  10. General
    2003 envoy 4.2L....replaced fan clutch/wiring harness. APP assembly. getting code P1217 5v reference. purchased a A/C delco thottle position sensor plug/pigtail. . any guidance on where to start or how to check for the voltage mismatch with a VOM? dont want to replace the entire throttle body...
  11. OEM Issues
    OK what started off to be a somewhat of a normal problem now has transformed into yet another problem. Murphy's Law comes knocking yet again at my house!!:hopeless A while back I noticed a somewhat fast coolant leak:worried:. All systems still running "belt was moving with fan". Then on the way...
  12. General
    Hey guys, I have been having problems with the reduced engine light coming on and I finally took it to Autozone to get it check. The code it read was p1217 They told me it was the accelerator sensor. Would that be the problem? I remember awhile back I was pressing the gas and my foot slipped...
  13. General
    2002 Trailblazer P0014 P1515 P1516 P0132 P1120 P1220 P1221 replaced camshaft sensor,TPS, throttle body reduced engine power light comes on
  14. General
    Just got my very own 2002 Trailblazer a few weeks ago. I took it out camping for the first time last weekend, driving on plenty of dirt roads and using the recently repaired 4x4. On the way home from the trip, I was driving down a canyon and ran into a mean thunderstorm with really heavy rain...
  15. OEM Issues
    About 4 months ago my 06 TB StabiliTrak Indicator Light, check engine light, reduced engine power light started coming on at the same time. With this my TB power is reduced by about 1/2. I cannot figure out why this is happening. If I turn off the TB and remove and replace the gas cap...
  16. General
    I have a 2004 Chevy Trailblazer w/ 150XXX miles. its been acting crazy it drives fine when the weather is cold. no problems. when the weather is over 65 degrees is when it seems the problem starts. I had about 10 codes and they all had to deal with the (TPS) in different readings I purchased...
  17. General
    I recently purchased a 2003 Trailblazer 6 cyl 4.2 with 45000 miles on it. With in the first week, the reduced engine power came on and check engine light. I took it to Autozone, and the OBD displayed two codes for Accelerator Pedal Position Sensor. They didn't have one in stock so I ordered one...
  18. OEM Issues
    Hello, I am new to the site and I had a problem yesterday. I have a 04 Trailblazer with 97,000 miles. LS 4X4 with no modifications. I was at a stop light and the light turned green I pressed the accelerator pedal the engine coughed a little and the REP light came on. I was able to make it...
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