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Service bulletin 15303

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10090008
Published by NHTSA2017-01-31
Manufacturer's number15303
Manufacturer's date2015-05-19
NHTSA componentSUSPENSION:REAR

NHTSA's summary

15303 - SERVICE UPDATE. THIS BULLETIN PROVIDES A SERVICE PROCEDURE FOR CERTAIN 2015 MODEL YEAR CHEVROLET TAHOE AND CHEVROLET SUBURBAN, GMC YUKON AND GMC YUKON XL 2WD VEHICLES EQUIPPED WITH AUTO LEVELLING REAR SUSPENSION (RPO Z85 AND AVF). THESE VEHICLES MAY HAVE AN AUTO-LEVELING FEATURE THAT IS INOPERATIVE. THE AUTO-LEVELING FEATURE WORKS BY SENSING WHEN THE REAR OF THE VEHICLE IS LOADED. REAR SHOCK ABSORBERS’ INTEGRAL AIR SACKS (BOOTS) ARE INFLATED TO COMPENSATE AND LEVEL THE VEHICLE. CUSTOMERS MAY NOTICE THE REAR TRIM HEIGHT LOWER IN THE REAR OF THE VEHICLE WHEN LOADED COMPARABLE TO VEHICLES WITHOUT AUTO-LEVELING REAR SUSPENSION.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Suspension

Vehicles listed
CHEVROLET SUBURBAN2015
CHEVROLET TAHOE2015
GMC YUKON2015
GMC YUKON XL2015

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
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05-03-07-009L2025-03-08. Service bulletin. This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles.
05-03-08-002J2024-09-20. Service bulletin. This service bulletin provides information to dealership personnel on diagnosis and replacement of shock absorber and strut due to fluid leak.
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15NA082B2023-12-11. Service bulletin. Clunking Noise from Front of Vehicle During Turns and/or Bumps
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