Replace the map sensor with a genuine gm part. My friend had same issue and we cleaned censor, no change, then we put a auto parts sensor in but the didn’t fix the problem. Finally we bought a gm map sensor and bingo it worked!!
07 Aggressive NA, 11-06 SOLD 9-17-08
09 WickedGXP9-25-08 Auto, Red calps,shorty antenna,windscreen,dibit & bkup light covers, leather armrests/console & door pockets,de-badged, pulsing 3rd light,GMPP CAI&tune, DDM susp set,Clear bra,garage opener in header, JPM lumbar,SOLO Mach Shty cat bk
09 Aggressive GXP Coupe 4-16-14, #577, Auto,soft top,Red calps,GM tune,GM acc whls,Conti Xtreme contact tires,pulsing 3rd light,red eng cover, DDM susp set,SOLO center Exh, Norm Valance