GMC, timing belt replacement in Zevulun

GMC, timing belt replacement in Zevulun.
Replacing the timing belt is a rather complex but scheduled procedure. However, in some cases, it may be required to replace the belt earlier due to its wear. First, remove the wheel and the top cover of the toothed belt, dismantle the lower protection of the gas distribution mechanism, loosen the tensioning roller, after which remove the belt, tensioner and auxiliary rollers. Replace the timing belt.