Question about 2004 GMC Sierra 2500

1 Answer

Transmission protection mode

My 2004 GMC 2500 keeps going into protection mode and making weird noises and slipping at initial excelleration, even when it is cool outside and not hot. I only have 30,000 miles on the truck.

Posted by on

  • Anonymous May 23, 2009

    I have the same problem with the ttransmission slipping at take off on my Sierra 2500 HD


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert that hasĀ over 500 points.


    An expert who has answered 200 questions.

  • Expert
  • 315 Answers

Not able to diagnose such a problem without looking at the truck. Have the dealership troubleshoot. Still got warranty?

Posted on Mar 03, 2009

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2004 gmc envoy went into limp mode and has no codes, any idea why

limp mode is a situation initiated by the ECM to protect the engine and/or the transmission
the problem is in the transmission and the TCM has lost continuity so at 2nd ratio it is shutting down the transmission so that more than 1 ratio cannot be selected together or the engine rpms can not go so high as to blow a motor
have the fault codes read to find the servo/ solenoid /sensor that has failed

Mar 22, 2017 | GMC Cars & Trucks

1 Answer

1997 GMC V8 Transmission will not go into reverse

Time for a rebuild or replace. Clutches burnt, bands worn out , torque converter whining or worse, planetary gears.

Oct 06, 2016 | GMC Cars & Trucks

1 Answer

I have a 2004 Ford Mustang, 3.8 l. Today, while stopped at a red light, the car did not "die" or stall, it just wouldnt go faster than a motorized wheelchair. Is this a transmission problem or a sol

if there is a check engine light read the codes at a parts store for free. it will tell you whats wrong. your car is in limp mode to protect itself from more damage. could be the computer senced the transmission slip or a lot of things. u need to read codes to find out

Mar 15, 2013 | 2004 Ford Mustang

1 Answer

Symptons of a bad transmission

Slow acceleration due to slipage, whining noises and just won't go into any gear or no reverse.

Jun 28, 2012 | 2004 Ford F150

1 Answer

2004 GMC Z71 1500 makes growling noise from tail of transmission while in 2wd or 4wd.

Is it a auto or manuel ****** , but either way it sounds like either the rear bushing is worn or the bearing or even possibly the u-joint .......

Nov 10, 2011 | 2004 GMC Sierra

2 Answers

1989 gmc 2500 305 engine back fire's on excelleration. Replaced Rotor and Cap. Also oxigen censer. Checked plugs, Wire's.

Backfire on acceleration could be caused by a worn lobe on the camshaft especially on a small block Chevy engine. You have to remove the valve covers and check the lift of each push rod. Sometimes it's quite obvious but sometimes it requires close inspection and even measuring the lift.

May 09, 2011 | 1989 GMC C2500

1 Answer

Check light appears on dash board and slips gears. Changed transmission oil and filter. The gears started changing normal but now slips gears when you excellerate the engine makes noise but car does not...


You should diagnose the check engine light. You can have this done at a mechanic or alternatively you can rent a scanner from a parts store. What may feel like a slipping transmission can be a misfire.

Mar 09, 2011 | 1998 Volkswagen Jetta

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

173 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

71525 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers

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

Answer questions

Manuals & User Guides