Re: spring length differences
Front springs were 44" for pre 73, and 47" after that till 91 when GM dropped that body style. IIRC rears were 52" up to 91, had 56" for 3/4 and 1 tons. In 88 when the new style came out, they were 63" for all trucks. 92 burbs and Tahoes were 54".
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2000 GMC CCSB 454/4L80 6” lift SAS
1999 Chevy CCSB 454/NV4500 4” SAS
1999 GMC Yukon 350/4L60 6" SAS
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