Dennis - I did a check of Chevy parts books to compare the GMC data provided by Bill H above. The GM# 1416760 brake shoe adjuster spring is the same for both GMC and Chevy 3/4 & 1 Tons. The GM# 3696704 brake shoe hold down spring kits are also the same for both GMC and Chevy.
The Chevy books though show GM# 3697428 for the brake shoe return springs for Chevy 3/4 & 1 Ton truck, instead of the GM# 3694822 Bill listed. All can be found from various vendors. Anything from some NOS stocks, NORS stocks from aftermarket manufacturers and some of our usual vendor sources to. Search using the GM part numbers and you should find what you need.
