Low A/C Refrigerant Level (Compressor To Condenser Line) (PIT5331)

WARNING: This page is about the Yukon SLE, 4WD, which is a different variant/trim than selected.

Publication date: 2014-10-06
Reference number: PIT5331

LOW A/C REFRIGERANT LEVEL (COMPRESSOR TO CONDENSER LINE)

TECHNICAL SERVICE BULLETIN

Reference Number(s): PIT5331, Date of Issue: Oct 6, 2014

Affected Model(s):

2015 Cadillac Escalade Models; 2014 - 2015 Chevrolet Silverado 1500; 2015 Chevrolet Suburban, Tahoe; 2014 - 2015 GMC Sierra 1500; 2015 GMC Yukon Models; For the 2015 models listed, this ONLY applies to early built 2015 models which have a muffler in the compressor to condenser line

NOTE: The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

CONDITION/CONCERN

NOTE: This information applies to all 2014 models and early built 2015 models which have a muffler in the compressor to condenser line (2). Shown below are pictures of the compressor to condenser line with the muffler (2) and without a muffler (1).

Some owners may comment that the a/c is blowing warm.

When checking the refrigerant level, it may be noticed that it is very low/empty.

If, after performing normal diagnostics and the source of the leak is either not found, or it is found at/near the rear of the compressor, it may be caused by a small crack in the compressor to condenser line.

The compressor to condenser line may have a small crack or pin hole located at the inside radius of the first bend near the compressor, as shown below.

If the a/c line cracks, it may spray oil and refrigerant onto the a/c compressor, making the source of the leak very hard to identify.

RECOMMENDATION/INSTRUCTIONS

To repair this condition and prevent it from reoccurring, replace the compressor to condenser line and install the line bracket shown below.

Replace the a/c compressor to condenser line, GM part number 23438932 following the appropriate SI replacement procedure.
Install line bracket part number 23264893 as shown below and torque bracket bolt to 5.5 - 8 ft lbs (7.5-10.5 NM)
Recharge refrigerant system to proper charge level: Utilities to NEW SPEC of 2.02 lbs (920g) (for more info see latest version of PIT5292) and Pick Up Trucks to 1.32 lbs (600g)
Leak test system and verify proper operation.

PARTS INFORMATION

Part Number	Description	Qty
23438932	HOSE ASM-A/C CNDSR	1
23264893	BRACKET ASM-A/C CMPR & CNDSR HOSE	1

WARRANTY INFORMATION

For vehicles repaired under warranty use:

WARRANTY INFORMATION

Labor Operation	Descripton	Labor Time
4415010	Air Conditioning Compressor Hose Replacement	Use Published Labor Operation Time

ADDITIONAL SI KEYWORDS:

HVAC dye hot

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.