Yes, the ticking is normal. Nothing to worry about.

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k great thx!

Service Information
2011 Chevrolet Camaro | Camaro (VIN F) Service Manual | Document ID: 2552056
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#07-06-04-025F: Information on Clicking/Ticking Sound/Noise Heard During Cold Start, Sound/Noise Decreases But Continues As Engine Warms - Normal Operation of High Pressure Fuel Pump and Injectors - (Dec 13, 2010)
Subject:
Information on Clicking/Ticking Sound/Noise Heard During Cold Start, Sound/Noise Decreases But Continues as Engine Warms – Normal Operation of High Pressure Fuel Pump and Injectors
Models:
2009-2011 Buick Enclave
2010-2011 Buick LaCrosse
2008-2011 Cadillac CTS, STS
2010-2011 Cadillac SRX
2009-2011 Chevrolet Traverse
2010-2011 Chevrolet Camaro, Equinox
2009-2011 GMC Acadia
2010-2011 GMC Terrain
2009-2010 Saturn OUTLOOK
Equipped with 3.0L or 3.6L VVT Direct Injection V6 Engine (VINs G, D, V, Y – RPOs LF1, LLT)
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This bulletin is being revised to add the 2011 model year. Please discard Corporate Bulletin Number 07-06-04-025E (Section 06 – Engine/Propulsion System).
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Do This
Inform the customer that this is normal operation of the high pressure fuel pump and injectors.
Don't Do This
DO NOT replace the high pressure fuel pump and or injectors.
The 3.0L and 3.6L SIDI engines (RPOs LF1 and LLT) use a direct injection fuel system that operates at very high fuel pressures. A direct injection fuel system produces a rapid clicking and ticking sound that can be heard from the engine compartment. The sound is more evident when outside around the vehicle or when the hood is open. The sound is more noticeable during idle and is more frequent during a cold start, but lessens once the engine is warm. The rapid ticking noise on cold start up is the fuel pump (located on the rear of the left cylinder head) building up high fuel pressure. When the engine warm-up is completed, the high pressure fuel pump will continue to tick at a lower rate of approximately one tick per second during idle. The clicking sound is the fuel injectors pulsing on and off under higher fuel pressures. These sounds are the results of a normal direct injection fuel system operating properly.
DO NOT attempt to repair or replace any parts for this kind of clicking or ticking concern. The clicking or ticking sound is not indicative of any concerns with the engine or the vehicle. You may wish to give the customer a copy of this bulletin.