A stock leaf-spring truck is not the mounting plan for this bar. QA1 52899 is a 1-1/4-inch tubular rear sway bar for the listed GM two-wheel-drive trucks already using the specified QA1 rear suspension system.
Fitment
1973-1986 Chevrolet C10 and GMC C15, plus 1987 Chevrolet R10 and GMC R15 as named in the manufacturer fitment table, 2WD only.
Works exclusively with the corresponding QA1 rear suspension system. The current installation guide excludes leaf-spring suspensions; it also uses GMC C1500/R1500 model names.
Included
Rear sway bar, polyurethane bushings, rear end links and mounting hardware. A front sway bar is not included.
Before ordering and installation
Confirm the QA1 rear system and frame/axle bracket locations before ordering. Keep wiring, brake lines and fuel lines below the frame brackets as directed; trapping a brake line behind a bracket is an expensive shortcut.
The supplier record says the bushings are not pre-greased. Grease and install them as instructed, then set the end links with the suspension loaded so the sway-bar arms sit level.
Use the current guide’s mounting diagram and torque chart. QA1’s manual states that installed products are not eligible for return and gives a one-year limited material/workmanship warranty to the original purchaser, subject to its terms.
Manufacturer warning
WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov
Manufacturer product information and fitment
Manufacturer installation guide