Deziree Posted on Feb 28, 2014

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Service engine light

Codes: co246, co252, co242, co251

1 Answer

john stanley

GMC Master 499 Answers
Posted on Feb 28, 2014

john stanley

GMC Master

Joined: Feb 10, 2014

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If its a service engine light , change the oil and filter

1 Related Answer

Mike Cairns

3054 Answers
Posted on Sep 16, 2011

SOURCE: abs code CO246, 2000 K3500 GMC w/7.4l , replaced

Here is some information that will help you, your code that is coming up or popping up is relating till the EBCM ground. Please Read below as some of this information might help you.

Some customers may comment that the ABS light is on. Upon further inspection, DTCs C0265 and C0201 may be set in the brake module. It is also possible for DTC U1041 to set in other modules. There may also be a loss of communication with the brake module.

Cause
A poor connection at the EBCM ground is causing unnecessary replacements of brake modules.

Important: The EBCM Ground is different for each application. Refer to the list below for the proper ground reference:

• Midsize Utilities = Ground 304

• SSR = Ground 400

• Fullsize Trucks and Utilities = Ground 110

Correction
DO NOT REPLACE THE BRAKE MODULE.

Perform the following steps to improve the connection of the EBCM Ground:

Remove the EBCM Ground. The EBCM Ground is located on the frame beneath the driver's side door. If multiple grounds are found in this location, the EBCM ground can be identified as the heavy (12-gauge) wire.
Clean the area, front and back, using a Whiz Wheel®.
Install the ground, then the washer and then the bolt to the frame.
Important: It is important to use the bolts, washers and nuts specified in this bulletin. These parts have been identified due to their conductive finish.

Install a washer and nut to the back side of the frame.
Tighten
Tighten the nut to 9 N·m (79 lb in).

Cover the front and back side of the repair area using Rubberized Undercoating.
An additional check can be made to ensure a good connection for the Battery Cable to Frame ground. It is possible for this ground to cause similar symptoms with the ABS as described above.

Parts Information
FULL-SIZE TRUCKS, SUVs AND H2

Part Number
Description

11588564
Bolt

15650962
Washer

15672934
Nut

12378398

(in Canada, 10952414)
Rubberized Undercoating -- Paintable

MIDSIZE SUVs

Part Number
Description

11517555
Bolt

15650961
Washer

11503749
Nut

I hope this helps for you, MIke

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