2005 Chevy Colorado code P0017

Can be anything from a bad actuator, test it by removing the actuator and applying 12v, does the pintle move? If yes it's OK, next is the harmonic balancer and the bolt check for proper torque, and watch the balancer, does it look normal? Can also be the timing chain and or the gears. Also consider this Tech Bulliten from GM.
Reducing Electrical Intermittents - Recrimping Electrical Connectors and Inspection of Related Wiring Harness Connections When Diagnosing Miscellaneous DTCs, Intermittent Driveability Concerns, Hard Start, No Start, Incorrect Gauges, Inoperative I/C Systems, ECM, TCM, SES/4WD Lamps Illuminated TECHNICAL SERVICE BULLETIN Reference Number(s): 08-06-03-009A, Â Date of Issue: Â October 29, 2008 Related Ref Number(s): 08-06-03-009, 08-06-03-009A ARTICLE BEGINNING ELECTRICAL INTERMITTENTS / RECRIMPING TERMINALS Electrical Intermittents can be a source of frustration for technicians and extended downtime for vehicles. Some circuits in vehicles are not only susceptible to an intermittent connection, but high resistance may also cause erratic operation or DTCs. An often overlooked possibility in the diagnostics of intermittents is the quality of the terminal crimps. DIAGNOSTIC METHODOLOGY When servicing a vehicle for any type of electrical concern, the following steps are imperative. Inspect and ensure the integrity of all related wiring harness connectors. If the wiring harness connectors are not properly constructed or engaged before they are locked together, numerous types of intermittent conditions can occur, which may include any of the symptoms listed in the Subject title above and possibly others. Affected Model(s): 2005-2009 GM Passenger Cars and Light Duty Trucks (including Saturn); 2003-2009 HUMMER H2; 2006-2009 HUMMER H3; 2005-2009 Saab 9-7X Attention: In some circuits where modules compare electrical values to determine proper operation or functioning, resistance differences as small as "milli -ohms" between wires may cause Diagnostic Trouble Codes (DTCs) to set. It is not possible to judge the electrical resistance of a crimped connection down to these fine values with a common Volt/Ohm Meter (VOM). If an intermittent DTC is being set (especially in an EBTCM, TPS, or ECM circuit) you should recrimp the terminals to the wires on both ends of the suspected harness before assuming the affected module is at fault. Supercedes: This bulletin is being revised to add additional information and to provide a dedicated Labor Operation for Recrimping Electrical Terminals. Please discard Corporate Bulletin Number 08-06-03-009 (Section 06 - Engine/Propulsion System). NOTE: In some circuits where modules compare electrical values to determine proper operation or function, resistance differences as small as "milli-ohms" may cause Diagnostic Trouble Codes (DTCs) to set. It is not possible to judge the electrical resistance of a crimped connection down to these fine values with a common Volt/Ohm Meter (VOM). If an intermittent DTC is being set (especially in an EBTCM, TPS, or ECM circuit), you should recrimp the terminals to the wires on both ends of the suspected harness before assuming the affected module is at fault.