Sierra 18-6451 Alternator
- Brand:
- Sierra
- Part no:
- 18-6451
Where to buy
View on Amazonpaid link
The Sierra 18-6451 is a replacement alternator with a serpentine pulley and an amp rating given as 11SI/95. It is listed as fitting GM L S engines. Sierra describes its replacement engine parts as designed to exceed OEM requirements. Cross references given are Arco 20827 and Indmar 575014. Check the pulley and rating against the unit you are replacing.
Our take
The amp rating is given as 11SI/95 and the fit as GM L S engines with a serpentine pulley, so this is a narrow match rather than a universal alternator. Compare the 11SI/95 code on your current unit.