Feature:
1. Due to the original factory standard, replacement for Suburban 1500 2500 3500.
2. 12558177 is the reference part number, no need to worry about adaptation issue.
3. Pair of knock sensor grommets for gen 3 LS based engine, has high quality in use.
4. Mount to the bottom of valley cover, directly replace the old or broken one.
5. Professional manufacturing, high precision, strong reliability, making sure safety use.

Specification:

Item Type: Knock Sensor Grommet
Material: Rubber
OE: 12558177
Fitment:
Replacement for Sierra
Replacement for Yukon
Replacement for Silverado
Replacement for Tahoe
Replacement for Express
Replacement for Suburban 1500 2500 3500
Replacement for Trailblazer TBSS.1999-2006/2007 4.8L 5.3L 6.0L Vortec
Replacement for Camaro
Replacement for GTO
Replacement for Trans Am
Replacement for Firebird
Replacement for LS1 LS2 LS6 5.7L 6.0L
Replacement for GM LS1 LQ4 LQ9 5.3 6.0 5.7L

Package List:
2 xKnock Sensor Grommet

Note:
1. Please double check the part number of your item, matching information is for reference only.
2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!