My 2003 Chevy Silverado stalls
Mileage = 80,000
Engine size = 5.3 L
dash lights = no
codes = no
work done to repair = replaced alternator
tech = MW
question = My truck stalls when I hit the brakes and turn into parking
spots. Also happens when I turn on the fan.


MW:
A common cause for these conditions is carbon ion the throttle body and
plate. Have the throttle body and plate cleaned with a carbon cleaner. Be
sure to get it clean. Open the throttle and clean the entire body and the
plate. This will usually fix this condition. This is assuming there is no
vacuum leak, as that can also cause a low speed/idle stall.
CHEVY DASH WARNING LIGHTS
2004 Chevy 1500. Vortec 4.3 V6.
Warning lights = yes. Computer codes: misfire P0300
Repairs for this problem: new spark plugs wires cap rotor. Question: my truck misses when it rains.
Answer: So, something is getting wet or has moisture
intrusion that is causing your problem. Since you have
replaced the usual causes of this problem, I'm going to say
that you most likely need an ignition coil. If the coil is even
slightly bad, it will arc on the metal that surrounds it and
cause your vehicle to run rough and misfire. You can check
this with a spray bottle filled with water, and while the engine
is running, lightly soak the coil and connectors and watch
for arcing. It might help to have someone brake torque the
vehicle while you do this, just to amplify the situation.