LD stands for Left hand Drive and RD for Right hand Drive. All the AD truck wiper motor brackets I've seen are as shown in the "RD" drawing, even though they re all "LD" trucks. GM has been known to makes mistakes (oops) in their published documentation. Ask anyone that has done a lot of searching through GM Master Parts Books. dang


~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)