Has anyone used an infant car seat in a 2007 Toyota Tacoma Access cab truck?

My husband has a 2007 Toyota Tacoma access cab. We have a newborn baby and plan on putting his rear-facing car seat in the back seat. The owner's manual gives instructions on installing an infant car seat into the truck. Is the Toyota Tacoma child restraint system safe? I figured it had to be safe if they provide this as a safety feature on the truck. I just want to make sure that the truck meets the same safety requirements as my 4-door car. The car seat is mainly put in my car, but we need to use my husband's truck this week. Please let me know if you have used a car seat in this truck.
The infant car seat we are using is the Graco Safe Seat.