A fuel filler cap problem on a 2006 Sierra could be due to a worn or damaged seal, which can lead to poor sealing and trigger the check engine light. Additionally, dirt or debris around the filler neck might prevent a proper seal. If the cap is not tightened correctly or is cracked, it can also cause fuel evaporation issues. Regular inspection and replacement of the cap can help resolve these issues.
You'd have to remove the filler neck. Those have anti-siphon necks to prevent people from doing exactly what you're trying to do.
The 2006 GMC Sierra-1500 has 12 valves.
The 2006 GMC Sierra-2500HD has a V8 engine.
The 2006 GMC Sierra-2500HD has 16 valves.
The 2006 GMC Sierra-2500HD has overhead valves (OHV).
The 2006 GMC Sierra-1500 has overhead valves (OHV).
The 2006 GMC Sierra-2500HD has a 5-speed manual.
The 2006 GMC Sierra-2500HD is a gas-powered vehicle.
The 2006 GMC Sierra-1500 has a 5-speed manual.
The 2006 GMC Sierra-1500 is a gas-powered vehicle.
Nigella's Christmas Kitchen - 2006 The Stocking Filler was released on: USA: 2009
The 2006 GMC Sierra-1500 is 17 ft. 1.7 in. (205.7 in.) long.