PIP5395H
Service Bulletin Details
Public Details for: PIP5395H
This preliminary information communication provides information to the technician on how to diagnose and repair vehicles that may have rattle or ticking noise that is louder inside the vehicle than outside. The noise may also sound like a l
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Bulletin No.: PIP5395H Published date: 01/24/2024 Preliminary Information PIP5395H Ticking Rattle Or Buzz Noise Heard The Best In The Passenger Compartment Models Brand: Model: Model Years: VIN: from to Engine: Transmissions: Cadillac CTS-V 2016 - 2018 All All 6.2L LT4 All Cadillac Escalade 2015 - 2018 All All 6.2L L86 All Chevrolet Camaro 2016 - 2023 All All 6.2L LT1 All Chevrolet Corvette 2014 - 2018 All All 6.2L LT1 LT4 All Chevrolet Silverado 2014 - 2018 All All 4.3L 5.3L 6.2L L83 L86 LV3 All Chevrolet Suburban 2015 - 2018 All All 5.3L L83 All Chevrolet Tahoe 2015 - 2018 All All 5.3L L83 All GMC Sierra 2014 - 2018 All All 4.3L 5.3L 6.2L L83 L86 LV3 All GMC Yukon Modules 2015 - 2018 All All 5.3L 6.2L L83 L86 All Supersession Statement This PI was superseded to update vehicle coverage. Please discard PIP5395G. The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI. Condition / Concern A customer concern of rattle or ticking noise that is louder inside the vehicle than outside. The noise may be picked up at the back of the left valve cover. The noise may also sound like a lifter tick. This may also be called a fuel line buzz or ringing noise. Recommendations / Instructions Listen to the fuel line connection at the left side of the engine. If the noise is heard best at the fuel line (this sound will be real loud with a stethoscope). The fuel feed line between the high pressure fuel pump and chassis fuel line could be the cause allowing high pressure pulsation back to the low side of the fuel system. There is not a good way to test the check valve, the line will need to be replaced. On pickups and SUVs, a vibration in the fuel line at the fuel tank may also be observed. There are two different fuel line types that contain this check valve and vary by model. The line above is the fuel feed pipe for Corvette, truck and SUV. This line connects the chassis fuel line to the high pressure fuel pump. These pictures above shows the chassis fuel feed pipe for the LT4 supercharged ZL1 Camaro (LT4 Camaro is now covered in 23-NA-207). On LT1 Camaro and LT4 CTS-V this line would have a jumper line with quick disconnects at both ends. One end will connect to the chassis line and the other to the high pressure pump feed line. Warranty Information For vehicles repaired under the Emission coverage, use the following labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage information. 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. © 2024 General Motors. All Rights Reserved.