2003 Sierra starts then dies
2003 Sierra v6, starts then dies. Very cold outside. If I keep pressing the gas it will run but when I let off and it comes to an idle it dies like its out of gas.
The next time I tried I turned the headlights off and it started and idled fine. As soon as I turned the headlights on it died. The battery is less that a year old. There are no CEL lights.