when i turn my heat or air on it doesn't blow out strong on 1991 Chevrolet S10 Blazer

i put the heat or air up on high and it barely blows out the vents. i don't k now what causes this

by in Simpsonville, SC on March 14, 2012
1 answer
ANSWER by , March 15, 2012
Most lilely its either a cabin air filter issue i.e. needs to be replaced or your blower motor resistor could be faulty