There may be a problem with fuel pressure when you first start it. The fuel pump relay may not be activating the pump at the first turn of the key. However, there was a recall on some of them which involves the PCM, for that type of concern.
Product Emission - PCM Integrated Circuit Chip Damage-Replace PCM
# XXXXX - (Apr 27, 2005)
2005 CHEVROLET MALIBU, UPLANDER, EQUINOX, CLASSIC, SILVERADO
2005 GMC SIERRA
2005 PONTIAC SUNFIRE, GRAND AM, G6, GRAND PRIX, MONTANA SV6
2005 BUICK LACROSSE / ALLURLE, TERRAZA
2005 SATURN RELAY
2006 PONTIAC G6
THIS BULLETIN IS BEING REVISED TO ADD 2005 AND 2006 MODEL YEAR VEHICLES TO THE RECALL. PLEASE DISCARD ALL COPIES OF 05539.
General Motors has decided to conduct a Voluntary Emission Recall involving certain 2005 Chevrolet Malibu, Uplander, Equinox, Classic, Silverado; GMC Sierra; Pontiac Sunfire, Grand Am, G6. Grand Prix, Montana SV6; Buick LaCrosse/Allure, Terraza; Saturn Relay; and 2006 Pontiac G6 model vehicles. The Powertrain/Engine Control Module (PCM/ECM) in these vehicles may have been manufactured with damaged internal IC chips, which may affect the Fuel Pump Control and EGR outputs of the PCM; or the Fuel Pump Control and Variable Nozzle Turbo Control (VNTC) outputs of the Diesel ECM. Customers may experience illumination of the Malfunction Indicator Lamp (MIL) or driveability complaints.
Dealers are to replace the Powertrain/Engine Control Module (PCM / ECM).