Some 2017-2025 Camaro models equipped with the 6.2L V8 engine (RPO LT4) may have a buzzing, ticking or rattle sound coming from the passenger side of the vehicle. The sound may seem to be louder inside the vehicle than outside. The sound may be originating from the fuel feed pipe. (Fig. 13)
Fig. 13
The fuel feed pipe between the high-pressure fuel pump and chassis fuel line may allow high pressure pulsation back to the low side of the fuel system. The pulsation may be due to a faulty pulse dampener internal to the part.
To help confirm the noise is present within the fuel feed pipe, follow the fuel line underneath the vehicle and perform a sound check at the location shown below. (Fig. 14) The internal pulse dampener itself cannot be tested.
Fig. 14
If the pulse dampener is validated as the source of the noise, replace the fuel feed pipe. The fuel feed pipe on the LT4 engine runs along the firewall and below the vehicle. It has a jumper line with quick disconnects at both ends. One end connects to the chassis line and the other end connects to the high-pressure pump feed line. (Fig. 15)
Fig. 15
Refer to Bulletin #23-NA-207 for additional information and part numbers.
– Thanks to Kurtis Hoezee
