Subject: SES Lamp With Fuel Rail Pressure Codes

Models: 2016 Cadillac CTS-V
2015-2016 Cadillac Escalade
2014-2016 Chevrolet Corvette
2014-2016 Chevrolet Silverado 1500 Suburban, Tahoe
2014-2016 GMC Sierra 1500 Yukon Yukon XL
Built with RPO's 4.3L 5.3L 6.2L L83 L86 LT1 LT4 LV3

This PI was superseded to update Model Years and Models. Please discard PIP5279.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern

A vehicle may have a customer concern of an SES lamp with fuel rail pressure sensor codes
On investigation there may be any of the following codes P0089, p127C, P127D, P0192, P0193. P228C, P228D and P006C

Recommendation/Instructions

Follow published Si diagnostics for the DTC's that have set, if it is inconclusive replace the FRPS (fuel rail pressure sensor).
Operate the vehicle under the condition for setting the DTC’s if possible to determine if the codes reset