File in Section:

Service Bulletin

Bulletin No.:
Date:

PI1199
March, 2014

PRELIMINARY INFORMATION
Subject:

Engine Cranks But Does Not Start, Engine Cranks With Loud Backfire, Engine Will
Start and Stall

Models:

2014 Chevrolet Silverado 1500
2014 GMC Sierra 1500
Equipped with 4.3L V-6 Engine — RPO LV3
Equipped with 5.3L V-8 Engine — RPO L83

Condition/Concern
Some customers may comment that the engine will crank but does not start, the engine will crank with a loud
backfire, and/or the engine will start and stall. They may also comment on a hissing noise coming from the tailpipe
area when cranking the engine.
The Service Personnel may observe that the vehicle will start after sitting in a heated shop for a few hours and there
will not be any related Diagnostic Trouble Codes (DTC) found.
The Condition/Concern may be caused by ice buildup in the exhaust system causing the passive exhaust valve
(PEV) to stick in the closed position.

Recommendation/Instructions
Notice: DO NOT leave the Passive Exhaust Valve (PEV) in a bolted or pinned open position. This action
creates an undesirable vibration and objectionable noise levels inside the cabin during Active Fuel
Management (AFM) activation. Please ensure that any of your customer’s vehicles that had been previously
temporarily modified are retrieved and addressed with this solution repair. Dealers with TAC cases created
where the temporary PI repair was provided will receive a notification that a service fix is now available.
If a vehicle is encountered with the above Condition/Concern as described, perform the following:
1. Perform the Diagnostic System Check - Vehicle.
⇒ If any DTCs are found, Go to: Diagnostic Trouble Code (DTC) List - Vehicle in SI.
⇒ If no DTCs are found, Go to Step 2.
2. Raise and support the vehicle. Refer to Lifting and Jacking in SI.

3709109

3. Exhaust system part identification:
– Exhaust Muffler Clamp Fastener (1)
– Exhaust Muffler Isolators (2)
– Exhaust Muffler (3)
Notice: DO NOT replace the catalytic converter. Refer to the Parts Information section in this Preliminary
Information (PI).
4. Replace the exhaust system. Refer to: Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement
in SI.

Parts Information
Part Number

23487117

23487118

Description

Vehicle / Body
Style / Engine
Application

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Series CK159 = 8 ft
Box Length
And
Body Style 03 =
Regular Cab
Engine RPO LV3
or L83

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Series CK157 = 6
ft-5” Box Length
And
Body Style 43 =
Crew Cab
Engine RPO LV3
or L83

Part Number

23487119

23487119

23487120

Description

Vehicle / Body
Style / Engine
Application

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Series CK155 = 5
ft-8” Box Length
And
Body Style 43 =
Crew Cab
Engine RPO LV3
or L83

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Series CK157 = 6
ft-5” Box Length
And
Body Style 53 =
Double Cab
Engine RPO LV3
or L83

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Series CK157 = 6
ft-5” Box Length
And
Body Style 03 =
Regular Cab
Engine RPO LV3
or L83

Warranty Information
For vehicles repaired under warranty, use:
Labor Operation

Description

Labor Time

4051980

Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement

Use Published
Labor
Operation Time