Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Refer to SIR Service Precautions

Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector.

Seat belt retractor pretensioner
Passenger instrument panel air bag
Seat Side air bag
Roof rail air bag
SDM
SDM wiring harness connector
Seat belt retractor pretensioner connector
Passenger instrument panel air bag wiring harness connector
Seat Side Air Bag wiring harness connector
Roof rail air bags wiring harness connector

NOTE:

The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.

If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct the high resistance condition due to terminal fretting corrosion.

Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay consistently between 1.7 and 4.2 Ω without any drop outs or spikes.

Passenger instrument panel air bag
Roof rail air bag
Seat side air bag
Seat belt retractor pretensioner
Any inline harness
SDM

If the reading is erratic while moving the harness, perform the following;

Inspect each connector terminal for damage or corrosion and repair as necessary.
Apply Nyogel lubricant 760G to each connector terminal.
Insure each connector and CPA is correctly seated.