Well, there are a couple of different ways you can go about this. You can find a website that allows you to download it for free, or you can purchase it at amazon. You could also call the manufacturer and request a new one.
The 2007 GMC Sierra-1500 has 16 valves.
The 2007 GMC Sierra-2500HD has 16 valves.
The 2007 GMC Sierra-2500HD has a V8 engine.
The 2007 GMC Sierra-3500HD has 16 valves.
The 2007 GMC Sierra-1500 has a V8 engine.
The 2007 GMC Sierra-3500HD has a V8 engine.
The 2007 GMC Sierra-3500HD is a gas-powered vehicle.
The 2007 GMC Sierra-3500HD has overhead valves (OHV).
The 2007 GMC Sierra-2500HD is a gas-powered vehicle.
The 2007 GMC Sierra-1500 is a gas-powered vehicle.
The 2007 GMC Sierra-3500HD has a 6-speed automatic.
The 2007 GMC Sierra-2500HD has overhead valves (OHV).