Where is wiper pulse module located on a 92 Chevy Cheyenne?

The wiper pulse module on a 1992 Chevy Cheyenne isn't a standalone, easily identifiable module like some later vehicles. The pulse function is typically integrated into the combination switch (also called the turn signal/wiper switch) itself. It's not a separate component you'll find tucked away somewhere else.

Therefore, the location you need to look is behind the steering wheel, in the steering column. You'll have to remove the steering wheel cover (usually a plastic panel) and likely the steering wheel itself (after disconnecting the battery and properly grounding yourself) to access the combination switch. The switch itself will be attached to the steering column.

Caution: Working on the steering column requires some mechanical aptitude. If you're not comfortable doing this yourself, take it to a qualified mechanic. Improper removal or reinstallation can damage the steering column or other components.