CHEVROLET, GMC · 2000-12-15
SUBJECT REGARDING DIAGNOSTIC TROUBLE CODE P1871 ON VEHICLES EQUIPPED WITH A 8.1-LITER GAS ENGINES AND THE ALLISON LCT1000 TRANSMISSION. IT HAS BEEN FOUND THAT THIS CODE EXISTS ON UNITS WITH LOW BATTERY VOLTAGE DURING ENGINE CRANKING DUE TO A LOW STATE OF CHARGE IN THE BATTERY. *TT