56Nomad
09-03-2004, 08:58 PM
Thanks jbplock ...........
http://service.gm.com/gmtechlink/images/issues/aug04/TLaug04e.html#story16
""Grade Braking – The primary purpose of the grade-braking feature is to utilize engine braking to slow a heavy vehicle on steep grades, in order to reduce wear on the traditional braking system. The method used to slow the vehicle is by overriding the PRNDL position, effectively pre-selecting the next lower gear range automatically.
TIP: The engine is designed to operate in the dashed red zone (fig. 2) on the tachometer but not in the solid red zone. The engine can operate in the dashed red range but cannot produce any power in this range. Do not operate the engine in the solid red zone.
When driving downhill on grades with heavy loads, the vehicle’s inertia can be great enough to increase vehicle speed and consequently engine speed without applying the throttle. To increase the availability of grade braking and provide for additional engine braking, the engine has been designed to allow operation in the dashed red zone region. Operation in this region is normal and will not damage the engine."
http://service.gm.com/gmtechlink/images/issues/aug04/TLaug04e.html#story16
""Grade Braking – The primary purpose of the grade-braking feature is to utilize engine braking to slow a heavy vehicle on steep grades, in order to reduce wear on the traditional braking system. The method used to slow the vehicle is by overriding the PRNDL position, effectively pre-selecting the next lower gear range automatically.
TIP: The engine is designed to operate in the dashed red zone (fig. 2) on the tachometer but not in the solid red zone. The engine can operate in the dashed red range but cannot produce any power in this range. Do not operate the engine in the solid red zone.
When driving downhill on grades with heavy loads, the vehicle’s inertia can be great enough to increase vehicle speed and consequently engine speed without applying the throttle. To increase the availability of grade braking and provide for additional engine braking, the engine has been designed to allow operation in the dashed red zone region. Operation in this region is normal and will not damage the engine."