20 Most Recent 2004 GMC Sierra Denali Questions & Answers


Your OBD port fuse may have blown. It is often the same fuse as the lighter.

2004 GMC Sierra... | Answered on Feb 03, 2018


P0134 O2 sensor drivers side before catalytic converters.
PO141 O2sensor drivers side after converter
P1133 insufficient switching of O2 sensors. Will probably
go away once sensors are replaced.

2004 GMC Sierra... | Answered on Jan 10, 2018


Are you talking about the HVAC SYSTEM? If so, there are 3to 4 in front , same with rear if you have rear air option. They have different part numbers too.

2004 GMC Sierra... | Answered on Jan 10, 2018


How do you know it's the circuit board ? What rear door ? Sound's to me like your best bet would be to take your vehicle to a qualified repair shop . Are your guessing or did you test ? Scan tool to check for diagnostic trouble code's ?

2004 GMC Sierra... | Answered on Nov 22, 2017


Have the vehicle checked for DTC'S - diagnostic trouble codes ! Do you know what electronic throttle control is ? The gas pedal assembly has electrical connector an sensors inside ,hooked to the PCM / ECM - engine computer . The engine computer uses these position sensors inputs to control the DC motor on the throttle body to open the throttle plate to control the speed . Plus there are position sensors inside the throttle body to input PCM/ECM to see if it's calculations are corect . Your best bet maybe to take it to a qualified repair shop .
Drive by Wire Function and diagnostics by Wells

Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The control module will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The control module will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The control module will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The control module will perform the following actions:
- Limit engine speed to idle by positioning throttle position, or by controlling fuel and spark if throttle is turned off.
- Ignore accelerator pedal input.
• Engine shutdown mode--The control module will disable fuel and de-energize the throttle actuator.

2004 GMC Sierra... | Answered on May 12, 2017


Look at your generator. There is something fault with it.

2004 GMC Sierra... | Answered on Jul 11, 2016


When the ignition is turned on do the console lights all go out?? If so it could be the positive wire that goes from the battery to the started. Could also be the relay, fuse, neutral switch (in neut and try).

2004 GMC Sierra... | Answered on Feb 02, 2016


Pull the pre O2 sensors( it will be loud). If it stays running longer, replace the catalytic converters.

2004 GMC Sierra... | Answered on May 07, 2015


mp4 works for mine

2004 GMC Sierra... | Answered on Apr 13, 2014


NEED TO HAVE CODES CHECKED, MOST COMMON IS
TRANSFER CASE ENCODER MOTOR

2004 GMC Sierra... | Answered on Dec 28, 2013


After you get the truck started disconect you battery cable and see if the truck continuse to run. if it dies you are having a problem with the charging system. make sure dont have any interior lighs left on.

2004 GMC Sierra... | Answered on Nov 07, 2013


If your signals & brakes are on 2 different circuits, ( for example a red lens for stop & an Amber for turn.) then you'll need to buy a converter that goes between vehicle & trailer. They're not too expensive at any trailer or RV place. I think some of the autoparts stores stock them now too.

2004 GMC Sierra... | Answered on May 01, 2013

Not finding what you are looking for?
Cars & Trucks Logo

126 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Top GMC Experts

Marvin
Marvin

Level 3 Expert

85223 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Denali GMC

  • Denali GMC

Most Popular Question

locting throttle position sensor 2003

  • Cars & Trucks
Loading...