[wagslick]

I have a 1999 Silverado Z71. Lately when I reach a stop light I've noticed the truck idling a little hard. Also, its getting worse. Now when i'm idling, the lights dim and the engine nearly stalls, then revs again, then seems to stall again. After about 10 min of driving once the engine gets up to speed, things seem to work just fine again. I got some of the following codes:

P0405 Exhaust gas recirculation sensor circuit low

P0440 Evaporative emission control system malfunction

P0449 Evaporativ emission contril sstem, vent control circuit malfunction

P1404 EGR valve closed pintle position

I'm tempted to just replace the whole dang EGR valve dealy but they run upwards of $150 and that sux. Is it the EGR valve thats crapped out? Should I replace it? Any thoughts would be helpful.