Normal. LV3, L83, L86, LT1 and LT4 are on the engine list for this PI (all those are Gen V small block engines).
Quote:
#PIP5179B: Extended Crank Cold With DI (Direct Injected) Engines
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern
DI (Direct Injected) Engines with concerns of extended or long crank time during cold ambient airtemps
Recommendation/Instructions
Direct Injection engines may have slightly longer cold crank times than that of port fuel engines.
Direct Injection systems run at higher pressures, and the mechanical pump on the engine must buildup the required pressure before the first injection event occurs.
The below are typical Direct Injection engine crank times on GASOLINE
Start up Coolant Temperature Crank Time
Above 10° C up to 1.5 sec
Between 10°c (50F) and (- 10°c 14F) up to 2.5 sec
Between (-10°c 14F) and (-20°c -4F) up to 3.5 sec
Between (-20°c -4F) and (-25°c -13F) up to 5 sec
Between (-25°c -13F) and (-30°c -22F) up to 7 sec
Below -30 deg. C -22F, the recommendation is to perform an assisted start (such as use of a blockheater).
Note: For ETHANOL fuel see #PIP5174: Extended Engine Crank Times When Using E85
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
|