Rear Of Vehicle Sits Uneven Or Low - keywords air compressor ECAS front G67 leak left line right sensor shock suspension
| Subject: | Rear of Vehicle Sits Uneven or Low keywords - Air Compressor ECAS Front G67 Leak Left Line Right Sensor Shock Suspension |
| Models: | 2004-2007 Buick Rainier |
| 2006-2008 Chevrolet Trailblazer SS & (Non Trailblazer SS with 20" wheel option new for 2008) |
| 2004-2008 GMC Envoy/Denali & (20" wheel option new for 2008) |
| 2004-2005 GMC XUV |
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
Some customers may comment that the rear suspension sits uneven or low. This will only affect vehicles with the ECAS rear suspension RPO G67.
Recommendation/Instructions:
Step | Action | Yes | No | |
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Refer to SI Document 1619715 | |
2 | Did you review the Air Suspension Description and Operation? | Go to Step 3 | Refer to SI Document 755608 | |
3 | Perform a visual inspection checking for the following: | Go to Step 10 | Go to Step 4 | |
A - Disconnected or damaged air lines. | ||||
B - Disconnected or damaged air sensor link. | ||||
C - Disconnected or damaged electrical harness. | ||||
Did you find and correct the condition? | ||||
4 | Cycle the rear compartment inflator switch. | Go to Step 5 | Refer to SI Document 1477088 | |
Does the compressor operate? | ||||
5 | Check the vehicle D-height . Refer to Trim Height Specifications Document 1749407 and Trim Height Inspection Document 1911408. | Go to Step 6 | Go to Step 7 | |
Are the measurements within the specified values? | ||||
6 | Perform the air suspension air leak diagnosis. Refer to Air Suspension Air Leak Diagnosis Document 1732108. | Go to Step 10 | System OK | |
Did you find and correct the condition? | ||||
7 | Recalibrate the air suspension level sensors. Refer to Air Spring Sensor Calibration Document 1911549. | Go to Step 10 | Go to Step 8 | |
Did you find and correct the condition? | ||||
8 | Replace the air spring sensor. Refer to Air Spring Leveling Sensor Replacement. Refer to Document 1618667. | Go to Step 10 | Go to Step 9 | |
Did you find and correct the condition? | ||||
9 | 1. Subtract the Service Preferred Trim Height specification from the value obtained in step 14 of the Air Spring Leveling Sensor replacement procedure. | Go to Step 10 | -- | |
2. Add the value to the Service Preferred Trim Height specification. This is the adjusted D-Height measurement. | ||||
3. Repeat the Air Spring Calibration procedure using this value in place of the D-Height specification in step 7 of the Air Spring Calibration procedure. | ||||
Did you find and correct the condition? | ||||
10 | Operate the system in order to verify the repair. | System OK | -- | |
Did you correct the condition? | ||||
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.
