1994 Buick Regal Gran Sport "changing time sports timer" Questions

time since and that was 8 months ago. It was happening daily. Little bit of a job since you have to pull the harmonic balancer but that old timer saved me a whole lot of continued frustration. Thought

...timer module (CTM) is on the ISO 9141 communication network. The GEM is equipped on vehicles with four-wheel drive or vehicles with power windows. The CTM is equipped on vehicles with two-wheel drive ...