Chevy Tahoe will not accelerate after car wash or rain.

What is your question?

2001 Tahoe will not accelerate after getting wet. I can rev engine in Neutral, but not in DRIVE. When it dries out it runs great. Today I went to the gym and while inside the skies opened up. I went to leave and started going, then acceleration stopped. Usually after a carwash it will take about 20 minutes to dry out and drive normally again. But not today. I maxed out at 5mph to get to a different parking lot, where it now sits. The vehicle purrs like a kitten on normal days. There are NO strange noises or smells. Key Points: -Runs perfect 99% of the time. -After getting wet from carwash or rain, DOES NOT accelerate in Drive. 5 MPH tops. -DOES accelerate and move quickly in Reverse. -DOES Rev high RPMs in Neutral. -After drying out, runs fine again.

What makes this problem better or worse?

Worse: Getting wet from carwash or HEAVY rain

How long has your 2001 Chevrolet Tahoe had this problem?

8 months with carwash, Today with rain.