I have a 2002 GMC Envoy with the "automatic" wipers.
If I run the windshield wipers in "manual" at Low or High speed they
work work well: smooth wipe across the glass. This tels me there is
nothing mechanically wrong with the motor, linkages or blades.
If I put wiper in "Automatic" they stutter and jerk as they move across
the windshield. This stuttering occurs if they come on because of rain
on the windshield or if I have activated the windshield washer paddle.
It only occurs in "automatic" mode.
Anyone know if this is a symptom of the wiper control recall? This is
the one where there is a vent hole in the wiper module that could take
on water and fail.